diff --git a/clients/client-elastic-load-balancing-v2/README.md b/clients/client-elastic-load-balancing-v2/README.md
index 4d36f45fc4fc1..53d7c2ccb4e1c 100644
--- a/clients/client-elastic-load-balancing-v2/README.md
+++ b/clients/client-elastic-load-balancing-v2/README.md
@@ -359,6 +359,14 @@ DescribeAccountLimits
 
 [Command API Reference](https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest/client/elastic-load-balancing-v2/command/DescribeAccountLimitsCommand/) / [Input](https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest/Package/-aws-sdk-client-elastic-load-balancing-v2/Interface/DescribeAccountLimitsCommandInput/) / [Output](https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest/Package/-aws-sdk-client-elastic-load-balancing-v2/Interface/DescribeAccountLimitsCommandOutput/)
 
+</details>
+<details>
+<summary>
+DescribeCapacityReservation
+</summary>
+
+[Command API Reference](https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest/client/elastic-load-balancing-v2/command/DescribeCapacityReservationCommand/) / [Input](https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest/Package/-aws-sdk-client-elastic-load-balancing-v2/Interface/DescribeCapacityReservationCommandInput/) / [Output](https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest/Package/-aws-sdk-client-elastic-load-balancing-v2/Interface/DescribeCapacityReservationCommandOutput/)
+
 </details>
 <details>
 <summary>
@@ -495,6 +503,14 @@ GetTrustStoreRevocationContent
 
 [Command API Reference](https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest/client/elastic-load-balancing-v2/command/GetTrustStoreRevocationContentCommand/) / [Input](https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest/Package/-aws-sdk-client-elastic-load-balancing-v2/Interface/GetTrustStoreRevocationContentCommandInput/) / [Output](https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest/Package/-aws-sdk-client-elastic-load-balancing-v2/Interface/GetTrustStoreRevocationContentCommandOutput/)
 
+</details>
+<details>
+<summary>
+ModifyCapacityReservation
+</summary>
+
+[Command API Reference](https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest/client/elastic-load-balancing-v2/command/ModifyCapacityReservationCommand/) / [Input](https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest/Package/-aws-sdk-client-elastic-load-balancing-v2/Interface/ModifyCapacityReservationCommandInput/) / [Output](https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest/Package/-aws-sdk-client-elastic-load-balancing-v2/Interface/ModifyCapacityReservationCommandOutput/)
+
 </details>
 <details>
 <summary>
diff --git a/clients/client-elastic-load-balancing-v2/src/ElasticLoadBalancingV2.ts b/clients/client-elastic-load-balancing-v2/src/ElasticLoadBalancingV2.ts
index 1348304880c8f..63cdf8f9ce8c7 100644
--- a/clients/client-elastic-load-balancing-v2/src/ElasticLoadBalancingV2.ts
+++ b/clients/client-elastic-load-balancing-v2/src/ElasticLoadBalancingV2.ts
@@ -70,6 +70,11 @@ import {
   DescribeAccountLimitsCommandInput,
   DescribeAccountLimitsCommandOutput,
 } from "./commands/DescribeAccountLimitsCommand";
+import {
+  DescribeCapacityReservationCommand,
+  DescribeCapacityReservationCommandInput,
+  DescribeCapacityReservationCommandOutput,
+} from "./commands/DescribeCapacityReservationCommand";
 import {
   DescribeListenerAttributesCommand,
   DescribeListenerAttributesCommandInput,
@@ -155,6 +160,11 @@ import {
   GetTrustStoreRevocationContentCommandInput,
   GetTrustStoreRevocationContentCommandOutput,
 } from "./commands/GetTrustStoreRevocationContentCommand";
+import {
+  ModifyCapacityReservationCommand,
+  ModifyCapacityReservationCommandInput,
+  ModifyCapacityReservationCommandOutput,
+} from "./commands/ModifyCapacityReservationCommand";
 import {
   ModifyListenerAttributesCommand,
   ModifyListenerAttributesCommandInput,
@@ -237,6 +247,7 @@ const commands = {
   DeleteTrustStoreCommand,
   DeregisterTargetsCommand,
   DescribeAccountLimitsCommand,
+  DescribeCapacityReservationCommand,
   DescribeListenerAttributesCommand,
   DescribeListenerCertificatesCommand,
   DescribeListenersCommand,
@@ -254,6 +265,7 @@ const commands = {
   GetResourcePolicyCommand,
   GetTrustStoreCaCertificatesBundleCommand,
   GetTrustStoreRevocationContentCommand,
+  ModifyCapacityReservationCommand,
   ModifyListenerCommand,
   ModifyListenerAttributesCommand,
   ModifyLoadBalancerAttributesCommand,
@@ -521,6 +533,23 @@ export interface ElasticLoadBalancingV2 {
     cb: (err: any, data?: DescribeAccountLimitsCommandOutput) => void
   ): void;
 
+  /**
+   * @see {@link DescribeCapacityReservationCommand}
+   */
+  describeCapacityReservation(
+    args: DescribeCapacityReservationCommandInput,
+    options?: __HttpHandlerOptions
+  ): Promise<DescribeCapacityReservationCommandOutput>;
+  describeCapacityReservation(
+    args: DescribeCapacityReservationCommandInput,
+    cb: (err: any, data?: DescribeCapacityReservationCommandOutput) => void
+  ): void;
+  describeCapacityReservation(
+    args: DescribeCapacityReservationCommandInput,
+    options: __HttpHandlerOptions,
+    cb: (err: any, data?: DescribeCapacityReservationCommandOutput) => void
+  ): void;
+
   /**
    * @see {@link DescribeListenerAttributesCommand}
    */
@@ -804,6 +833,23 @@ export interface ElasticLoadBalancingV2 {
     cb: (err: any, data?: GetTrustStoreRevocationContentCommandOutput) => void
   ): void;
 
+  /**
+   * @see {@link ModifyCapacityReservationCommand}
+   */
+  modifyCapacityReservation(
+    args: ModifyCapacityReservationCommandInput,
+    options?: __HttpHandlerOptions
+  ): Promise<ModifyCapacityReservationCommandOutput>;
+  modifyCapacityReservation(
+    args: ModifyCapacityReservationCommandInput,
+    cb: (err: any, data?: ModifyCapacityReservationCommandOutput) => void
+  ): void;
+  modifyCapacityReservation(
+    args: ModifyCapacityReservationCommandInput,
+    options: __HttpHandlerOptions,
+    cb: (err: any, data?: ModifyCapacityReservationCommandOutput) => void
+  ): void;
+
   /**
    * @see {@link ModifyListenerCommand}
    */
diff --git a/clients/client-elastic-load-balancing-v2/src/ElasticLoadBalancingV2Client.ts b/clients/client-elastic-load-balancing-v2/src/ElasticLoadBalancingV2Client.ts
index 10799cfbea1b2..8779e8799a9f2 100644
--- a/clients/client-elastic-load-balancing-v2/src/ElasticLoadBalancingV2Client.ts
+++ b/clients/client-elastic-load-balancing-v2/src/ElasticLoadBalancingV2Client.ts
@@ -81,6 +81,10 @@ import {
   DescribeAccountLimitsCommandInput,
   DescribeAccountLimitsCommandOutput,
 } from "./commands/DescribeAccountLimitsCommand";
+import {
+  DescribeCapacityReservationCommandInput,
+  DescribeCapacityReservationCommandOutput,
+} from "./commands/DescribeCapacityReservationCommand";
 import {
   DescribeListenerAttributesCommandInput,
   DescribeListenerAttributesCommandOutput,
@@ -137,6 +141,10 @@ import {
   GetTrustStoreRevocationContentCommandInput,
   GetTrustStoreRevocationContentCommandOutput,
 } from "./commands/GetTrustStoreRevocationContentCommand";
+import {
+  ModifyCapacityReservationCommandInput,
+  ModifyCapacityReservationCommandOutput,
+} from "./commands/ModifyCapacityReservationCommand";
 import {
   ModifyListenerAttributesCommandInput,
   ModifyListenerAttributesCommandOutput,
@@ -198,6 +206,7 @@ export type ServiceInputTypes =
   | DeleteTrustStoreCommandInput
   | DeregisterTargetsCommandInput
   | DescribeAccountLimitsCommandInput
+  | DescribeCapacityReservationCommandInput
   | DescribeListenerAttributesCommandInput
   | DescribeListenerCertificatesCommandInput
   | DescribeListenersCommandInput
@@ -215,6 +224,7 @@ export type ServiceInputTypes =
   | GetResourcePolicyCommandInput
   | GetTrustStoreCaCertificatesBundleCommandInput
   | GetTrustStoreRevocationContentCommandInput
+  | ModifyCapacityReservationCommandInput
   | ModifyListenerAttributesCommandInput
   | ModifyListenerCommandInput
   | ModifyLoadBalancerAttributesCommandInput
@@ -251,6 +261,7 @@ export type ServiceOutputTypes =
   | DeleteTrustStoreCommandOutput
   | DeregisterTargetsCommandOutput
   | DescribeAccountLimitsCommandOutput
+  | DescribeCapacityReservationCommandOutput
   | DescribeListenerAttributesCommandOutput
   | DescribeListenerCertificatesCommandOutput
   | DescribeListenersCommandOutput
@@ -268,6 +279,7 @@ export type ServiceOutputTypes =
   | GetResourcePolicyCommandOutput
   | GetTrustStoreCaCertificatesBundleCommandOutput
   | GetTrustStoreRevocationContentCommandOutput
+  | ModifyCapacityReservationCommandOutput
   | ModifyListenerAttributesCommandOutput
   | ModifyListenerCommandOutput
   | ModifyLoadBalancerAttributesCommandOutput
diff --git a/clients/client-elastic-load-balancing-v2/src/commands/DescribeCapacityReservationCommand.ts b/clients/client-elastic-load-balancing-v2/src/commands/DescribeCapacityReservationCommand.ts
new file mode 100644
index 0000000000000..15425b5966e55
--- /dev/null
+++ b/clients/client-elastic-load-balancing-v2/src/commands/DescribeCapacityReservationCommand.ts
@@ -0,0 +1,113 @@
+// smithy-typescript generated code
+import { getEndpointPlugin } from "@smithy/middleware-endpoint";
+import { getSerdePlugin } from "@smithy/middleware-serde";
+import { Command as $Command } from "@smithy/smithy-client";
+import { MetadataBearer as __MetadataBearer } from "@smithy/types";
+
+import {
+  ElasticLoadBalancingV2ClientResolvedConfig,
+  ServiceInputTypes,
+  ServiceOutputTypes,
+} from "../ElasticLoadBalancingV2Client";
+import { commonParams } from "../endpoint/EndpointParameters";
+import { DescribeCapacityReservationInput, DescribeCapacityReservationOutput } from "../models/models_0";
+import { de_DescribeCapacityReservationCommand, se_DescribeCapacityReservationCommand } from "../protocols/Aws_query";
+
+/**
+ * @public
+ */
+export type { __MetadataBearer };
+export { $Command };
+/**
+ * @public
+ *
+ * The input for {@link DescribeCapacityReservationCommand}.
+ */
+export interface DescribeCapacityReservationCommandInput extends DescribeCapacityReservationInput {}
+/**
+ * @public
+ *
+ * The output of {@link DescribeCapacityReservationCommand}.
+ */
+export interface DescribeCapacityReservationCommandOutput extends DescribeCapacityReservationOutput, __MetadataBearer {}
+
+/**
+ * <p>Describes the capacity reservation status for the specified load balancer.</p>
+ * @example
+ * Use a bare-bones client and the command you need to make an API call.
+ * ```javascript
+ * import { ElasticLoadBalancingV2Client, DescribeCapacityReservationCommand } from "@aws-sdk/client-elastic-load-balancing-v2"; // ES Modules import
+ * // const { ElasticLoadBalancingV2Client, DescribeCapacityReservationCommand } = require("@aws-sdk/client-elastic-load-balancing-v2"); // CommonJS import
+ * const client = new ElasticLoadBalancingV2Client(config);
+ * const input = { // DescribeCapacityReservationInput
+ *   LoadBalancerArn: "STRING_VALUE", // required
+ * };
+ * const command = new DescribeCapacityReservationCommand(input);
+ * const response = await client.send(command);
+ * // { // DescribeCapacityReservationOutput
+ * //   LastModifiedTime: new Date("TIMESTAMP"),
+ * //   DecreaseRequestsRemaining: Number("int"),
+ * //   MinimumLoadBalancerCapacity: { // MinimumLoadBalancerCapacity
+ * //     CapacityUnits: Number("int"),
+ * //   },
+ * //   CapacityReservationState: [ // ZonalCapacityReservationStates
+ * //     { // ZonalCapacityReservationState
+ * //       State: { // CapacityReservationStatus
+ * //         Code: "provisioned" || "pending" || "rebalancing" || "failed",
+ * //         Reason: "STRING_VALUE",
+ * //       },
+ * //       AvailabilityZone: "STRING_VALUE",
+ * //       EffectiveCapacityUnits: Number("double"),
+ * //     },
+ * //   ],
+ * // };
+ *
+ * ```
+ *
+ * @param DescribeCapacityReservationCommandInput - {@link DescribeCapacityReservationCommandInput}
+ * @returns {@link DescribeCapacityReservationCommandOutput}
+ * @see {@link DescribeCapacityReservationCommandInput} for command's `input` shape.
+ * @see {@link DescribeCapacityReservationCommandOutput} for command's `response` shape.
+ * @see {@link ElasticLoadBalancingV2ClientResolvedConfig | config} for ElasticLoadBalancingV2Client's `config` shape.
+ *
+ * @throws {@link LoadBalancerNotFoundException} (client fault)
+ *  <p>The specified load balancer does not exist.</p>
+ *
+ * @throws {@link ElasticLoadBalancingV2ServiceException}
+ * <p>Base exception class for all service exceptions from ElasticLoadBalancingV2 service.</p>
+ *
+ * @public
+ */
+export class DescribeCapacityReservationCommand extends $Command
+  .classBuilder<
+    DescribeCapacityReservationCommandInput,
+    DescribeCapacityReservationCommandOutput,
+    ElasticLoadBalancingV2ClientResolvedConfig,
+    ServiceInputTypes,
+    ServiceOutputTypes
+  >()
+  .ep(commonParams)
+  .m(function (this: any, Command: any, cs: any, config: ElasticLoadBalancingV2ClientResolvedConfig, o: any) {
+    return [
+      getSerdePlugin(config, this.serialize, this.deserialize),
+      getEndpointPlugin(config, Command.getEndpointParameterInstructions()),
+    ];
+  })
+  .s("ElasticLoadBalancing_v10", "DescribeCapacityReservation", {})
+  .n("ElasticLoadBalancingV2Client", "DescribeCapacityReservationCommand")
+  .f(void 0, void 0)
+  .ser(se_DescribeCapacityReservationCommand)
+  .de(de_DescribeCapacityReservationCommand)
+  .build() {
+  /** @internal type navigation helper, not in runtime. */
+  protected declare static __types: {
+    api: {
+      input: DescribeCapacityReservationInput;
+      output: DescribeCapacityReservationOutput;
+    };
+    sdk: {
+      input: DescribeCapacityReservationCommandInput;
+      output: DescribeCapacityReservationCommandOutput;
+    };
+  };
+}
diff --git a/clients/client-elastic-load-balancing-v2/src/commands/ModifyCapacityReservationCommand.ts b/clients/client-elastic-load-balancing-v2/src/commands/ModifyCapacityReservationCommand.ts
new file mode 100644
index 0000000000000..cecbdae36011e
--- /dev/null
+++ b/clients/client-elastic-load-balancing-v2/src/commands/ModifyCapacityReservationCommand.ts
@@ -0,0 +1,140 @@
+// smithy-typescript generated code
+import { getEndpointPlugin } from "@smithy/middleware-endpoint";
+import { getSerdePlugin } from "@smithy/middleware-serde";
+import { Command as $Command } from "@smithy/smithy-client";
+import { MetadataBearer as __MetadataBearer } from "@smithy/types";
+
+import {
+  ElasticLoadBalancingV2ClientResolvedConfig,
+  ServiceInputTypes,
+  ServiceOutputTypes,
+} from "../ElasticLoadBalancingV2Client";
+import { commonParams } from "../endpoint/EndpointParameters";
+import { ModifyCapacityReservationInput, ModifyCapacityReservationOutput } from "../models/models_0";
+import { de_ModifyCapacityReservationCommand, se_ModifyCapacityReservationCommand } from "../protocols/Aws_query";
+
+/**
+ * @public
+ */
+export type { __MetadataBearer };
+export { $Command };
+/**
+ * @public
+ *
+ * The input for {@link ModifyCapacityReservationCommand}.
+ */
+export interface ModifyCapacityReservationCommandInput extends ModifyCapacityReservationInput {}
+/**
+ * @public
+ *
+ * The output of {@link ModifyCapacityReservationCommand}.
+ */
+export interface ModifyCapacityReservationCommandOutput extends ModifyCapacityReservationOutput, __MetadataBearer {}
+
+/**
+ * <p>Modifies the capacity reservation of the specified load balancer.</p>
+ *          <p>When modifying capacity reservation, you must include at least one <code>MinimumLoadBalancerCapacity</code>
+ *       or <code>ResetCapacityReservation</code>.</p>
+ * @example
+ * Use a bare-bones client and the command you need to make an API call.
+ * ```javascript
+ * import { ElasticLoadBalancingV2Client, ModifyCapacityReservationCommand } from "@aws-sdk/client-elastic-load-balancing-v2"; // ES Modules import
+ * // const { ElasticLoadBalancingV2Client, ModifyCapacityReservationCommand } = require("@aws-sdk/client-elastic-load-balancing-v2"); // CommonJS import
+ * const client = new ElasticLoadBalancingV2Client(config);
+ * const input = { // ModifyCapacityReservationInput
+ *   LoadBalancerArn: "STRING_VALUE", // required
+ *   MinimumLoadBalancerCapacity: { // MinimumLoadBalancerCapacity
+ *     CapacityUnits: Number("int"),
+ *   },
+ *   ResetCapacityReservation: true || false,
+ * };
+ * const command = new ModifyCapacityReservationCommand(input);
+ * const response = await client.send(command);
+ * // { // ModifyCapacityReservationOutput
+ * //   LastModifiedTime: new Date("TIMESTAMP"),
+ * //   DecreaseRequestsRemaining: Number("int"),
+ * //   MinimumLoadBalancerCapacity: { // MinimumLoadBalancerCapacity
+ * //     CapacityUnits: Number("int"),
+ * //   },
+ * //   CapacityReservationState: [ // ZonalCapacityReservationStates
+ * //     { // ZonalCapacityReservationState
+ * //       State: { // CapacityReservationStatus
+ * //         Code: "provisioned" || "pending" || "rebalancing" || "failed",
+ * //         Reason: "STRING_VALUE",
+ * //       },
+ * //       AvailabilityZone: "STRING_VALUE",
+ * //       EffectiveCapacityUnits: Number("double"),
+ * //     },
+ * //   ],
+ * // };
+ *
+ * ```
+ *
+ * @param ModifyCapacityReservationCommandInput - {@link ModifyCapacityReservationCommandInput}
+ * @returns {@link ModifyCapacityReservationCommandOutput}
+ * @see {@link ModifyCapacityReservationCommandInput} for command's `input` shape.
+ * @see {@link ModifyCapacityReservationCommandOutput} for command's `response` shape.
+ * @see {@link ElasticLoadBalancingV2ClientResolvedConfig | config} for ElasticLoadBalancingV2Client's `config` shape.
+ *
+ * @throws {@link CapacityDecreaseRequestsLimitExceededException} (client fault)
+ *  <p>You've exceeded the daily capacity decrease limit for this reservation.</p>
+ *
+ * @throws {@link CapacityReservationPendingException} (client fault)
+ *  <p>There is a pending capacity reservation.</p>
+ *
+ * @throws {@link CapacityUnitsLimitExceededException} (client fault)
+ *  <p>You've exceeded the capacity units limit.</p>
+ *
+ * @throws {@link InsufficientCapacityException} (server fault)
+ *  <p>There is insufficient capacity to reserve.</p>
+ *
+ * @throws {@link InvalidConfigurationRequestException} (client fault)
+ *  <p>The requested configuration is not valid.</p>
+ *
+ * @throws {@link LoadBalancerNotFoundException} (client fault)
+ *  <p>The specified load balancer does not exist.</p>
+ *
+ * @throws {@link OperationNotPermittedException} (client fault)
+ *  <p>This operation is not allowed.</p>
+ *
+ * @throws {@link PriorRequestNotCompleteException} (client fault)
+ *  <p>This operation is not allowed while a prior request has not been completed.</p>
+ *
+ * @throws {@link ElasticLoadBalancingV2ServiceException}
+ * <p>Base exception class for all service exceptions from ElasticLoadBalancingV2 service.</p>
+ *
+ * @public
+ */
+export class ModifyCapacityReservationCommand extends $Command
+  .classBuilder<
+    ModifyCapacityReservationCommandInput,
+    ModifyCapacityReservationCommandOutput,
+    ElasticLoadBalancingV2ClientResolvedConfig,
+    ServiceInputTypes,
+    ServiceOutputTypes
+  >()
+  .ep(commonParams)
+  .m(function (this: any, Command: any, cs: any, config: ElasticLoadBalancingV2ClientResolvedConfig, o: any) {
+    return [
+      getSerdePlugin(config, this.serialize, this.deserialize),
+      getEndpointPlugin(config, Command.getEndpointParameterInstructions()),
+    ];
+  })
+  .s("ElasticLoadBalancing_v10", "ModifyCapacityReservation", {})
+  .n("ElasticLoadBalancingV2Client", "ModifyCapacityReservationCommand")
+  .f(void 0, void 0)
+  .ser(se_ModifyCapacityReservationCommand)
+  .de(de_ModifyCapacityReservationCommand)
+  .build() {
+  /** @internal type navigation helper, not in runtime. */
+  protected declare static __types: {
+    api: {
+      input: ModifyCapacityReservationInput;
+      output: ModifyCapacityReservationOutput;
+    };
+    sdk: {
+      input: ModifyCapacityReservationCommandInput;
+      output: ModifyCapacityReservationCommandOutput;
+    };
+  };
+}
diff --git a/clients/client-elastic-load-balancing-v2/src/commands/SetSubnetsCommand.ts b/clients/client-elastic-load-balancing-v2/src/commands/SetSubnetsCommand.ts
index 12a0a183fbb5c..306ee16ad508a 100644
--- a/clients/client-elastic-load-balancing-v2/src/commands/SetSubnetsCommand.ts
+++ b/clients/client-elastic-load-balancing-v2/src/commands/SetSubnetsCommand.ts
@@ -100,6 +100,9 @@ export interface SetSubnetsCommandOutput extends SetSubnetsOutput, __MetadataBea
  * @throws {@link AvailabilityZoneNotSupportedException} (client fault)
  *  <p>The specified Availability Zone is not supported.</p>
  *
+ * @throws {@link CapacityReservationPendingException} (client fault)
+ *  <p>There is a pending capacity reservation.</p>
+ *
  * @throws {@link InvalidConfigurationRequestException} (client fault)
  *  <p>The requested configuration is not valid.</p>
  *
diff --git a/clients/client-elastic-load-balancing-v2/src/commands/index.ts b/clients/client-elastic-load-balancing-v2/src/commands/index.ts
index 394a3515c90df..3975ae263743b 100644
--- a/clients/client-elastic-load-balancing-v2/src/commands/index.ts
+++ b/clients/client-elastic-load-balancing-v2/src/commands/index.ts
@@ -15,6 +15,7 @@ export * from "./DeleteTargetGroupCommand";
 export * from "./DeleteTrustStoreCommand";
 export * from "./DeregisterTargetsCommand";
 export * from "./DescribeAccountLimitsCommand";
+export * from "./DescribeCapacityReservationCommand";
 export * from "./DescribeListenerAttributesCommand";
 export * from "./DescribeListenerCertificatesCommand";
 export * from "./DescribeListenersCommand";
@@ -32,6 +33,7 @@ export * from "./DescribeTrustStoresCommand";
 export * from "./GetResourcePolicyCommand";
 export * from "./GetTrustStoreCaCertificatesBundleCommand";
 export * from "./GetTrustStoreRevocationContentCommand";
+export * from "./ModifyCapacityReservationCommand";
 export * from "./ModifyListenerAttributesCommand";
 export * from "./ModifyListenerCommand";
 export * from "./ModifyLoadBalancerAttributesCommand";
diff --git a/clients/client-elastic-load-balancing-v2/src/models/models_0.ts b/clients/client-elastic-load-balancing-v2/src/models/models_0.ts
index ad86ae172106d..e4a20f8c13fdf 100644
--- a/clients/client-elastic-load-balancing-v2/src/models/models_0.ts
+++ b/clients/client-elastic-load-balancing-v2/src/models/models_0.ts
@@ -1187,6 +1187,107 @@ export class CaCertificatesBundleNotFoundException extends __BaseException {
   }
 }
 
+/**
+ * <p>You've exceeded the daily capacity decrease limit for this reservation.</p>
+ * @public
+ */
+export class CapacityDecreaseRequestsLimitExceededException extends __BaseException {
+  readonly name: "CapacityDecreaseRequestsLimitExceededException" = "CapacityDecreaseRequestsLimitExceededException";
+  readonly $fault: "client" = "client";
+  Message?: string | undefined;
+  /**
+   * @internal
+   */
+  constructor(opts: __ExceptionOptionType<CapacityDecreaseRequestsLimitExceededException, __BaseException>) {
+    super({
+      name: "CapacityDecreaseRequestsLimitExceededException",
+      $fault: "client",
+      ...opts,
+    });
+    Object.setPrototypeOf(this, CapacityDecreaseRequestsLimitExceededException.prototype);
+    this.Message = opts.Message;
+  }
+}
+
+/**
+ * <p>There is a pending capacity reservation.</p>
+ * @public
+ */
+export class CapacityReservationPendingException extends __BaseException {
+  readonly name: "CapacityReservationPendingException" = "CapacityReservationPendingException";
+  readonly $fault: "client" = "client";
+  Message?: string | undefined;
+  /**
+   * @internal
+   */
+  constructor(opts: __ExceptionOptionType<CapacityReservationPendingException, __BaseException>) {
+    super({
+      name: "CapacityReservationPendingException",
+      $fault: "client",
+      ...opts,
+    });
+    Object.setPrototypeOf(this, CapacityReservationPendingException.prototype);
+    this.Message = opts.Message;
+  }
+}
+
+/**
+ * @public
+ * @enum
+ */
+export const CapacityReservationStateEnum = {
+  FAILED: "failed",
+  PENDING: "pending",
+  PROVISIONED: "provisioned",
+  REBALANCING: "rebalancing",
+} as const;
+
+/**
+ * @public
+ */
+export type CapacityReservationStateEnum =
+  (typeof CapacityReservationStateEnum)[keyof typeof CapacityReservationStateEnum];
+
+/**
+ * <p>The status of a capacity reservation.</p>
+ * @public
+ */
+export interface CapacityReservationStatus {
+  /**
+   * <p>The status code.</p>
+   * @public
+   */
+  Code?: CapacityReservationStateEnum | undefined;
+
+  /**
+   * <p>The reason code for the status.</p>
+   * @public
+   */
+  Reason?: string | undefined;
+}
+
+/**
+ * <p>You've exceeded the capacity units limit.</p>
+ * @public
+ */
+export class CapacityUnitsLimitExceededException extends __BaseException {
+  readonly name: "CapacityUnitsLimitExceededException" = "CapacityUnitsLimitExceededException";
+  readonly $fault: "client" = "client";
+  Message?: string | undefined;
+  /**
+   * @internal
+   */
+  constructor(opts: __ExceptionOptionType<CapacityUnitsLimitExceededException, __BaseException>) {
+    super({
+      name: "CapacityUnitsLimitExceededException",
+      $fault: "client",
+      ...opts,
+    });
+    Object.setPrototypeOf(this, CapacityUnitsLimitExceededException.prototype);
+    this.Message = opts.Message;
+  }
+}
+
 /**
  * <p>Information about a cipher used in a policy.</p>
  * @public
@@ -3658,6 +3759,82 @@ export interface DescribeAccountLimitsOutput {
   NextMarker?: string | undefined;
 }
 
+/**
+ * @public
+ */
+export interface DescribeCapacityReservationInput {
+  /**
+   * <p>The Amazon Resource Name (ARN) of the load balancer.</p>
+   * @public
+   */
+  LoadBalancerArn: string | undefined;
+}
+
+/**
+ * <p>The capacity reservation status for each availability zone.</p>
+ * @public
+ */
+export interface ZonalCapacityReservationState {
+  /**
+   * <p>The state of the capacity reservation.</p>
+   * @public
+   */
+  State?: CapacityReservationStatus | undefined;
+
+  /**
+   * <p>Information about the availability zone.</p>
+   * @public
+   */
+  AvailabilityZone?: string | undefined;
+
+  /**
+   * <p>The number of effective capacity units.</p>
+   * @public
+   */
+  EffectiveCapacityUnits?: number | undefined;
+}
+
+/**
+ * <p>The minimum capacity for a load balancer.</p>
+ * @public
+ */
+export interface MinimumLoadBalancerCapacity {
+  /**
+   * <p>The number of capacity units.</p>
+   * @public
+   */
+  CapacityUnits?: number | undefined;
+}
+
+/**
+ * @public
+ */
+export interface DescribeCapacityReservationOutput {
+  /**
+   * <p>The last time the capacity reservation was modified.</p>
+   * @public
+   */
+  LastModifiedTime?: Date | undefined;
+
+  /**
+   * <p>The amount of daily capacity decreases remaining.</p>
+   * @public
+   */
+  DecreaseRequestsRemaining?: number | undefined;
+
+  /**
+   * <p>The requested minimum capacity reservation for the load balancer</p>
+   * @public
+   */
+  MinimumLoadBalancerCapacity?: MinimumLoadBalancerCapacity | undefined;
+
+  /**
+   * <p>The state of the capacity reservation.</p>
+   * @public
+   */
+  CapacityReservationState?: ZonalCapacityReservationState[] | undefined;
+}
+
 /**
  * @public
  */
@@ -5072,6 +5249,102 @@ export interface GetTrustStoreRevocationContentOutput {
   Location?: string | undefined;
 }
 
+/**
+ * <p>There is insufficient capacity to reserve.</p>
+ * @public
+ */
+export class InsufficientCapacityException extends __BaseException {
+  readonly name: "InsufficientCapacityException" = "InsufficientCapacityException";
+  readonly $fault: "server" = "server";
+  Message?: string | undefined;
+  /**
+   * @internal
+   */
+  constructor(opts: __ExceptionOptionType<InsufficientCapacityException, __BaseException>) {
+    super({
+      name: "InsufficientCapacityException",
+      $fault: "server",
+      ...opts,
+    });
+    Object.setPrototypeOf(this, InsufficientCapacityException.prototype);
+    this.Message = opts.Message;
+  }
+}
+
+/**
+ * @public
+ */
+export interface ModifyCapacityReservationInput {
+  /**
+   * <p>The Amazon Resource Name (ARN) of the load balancer.</p>
+   * @public
+   */
+  LoadBalancerArn: string | undefined;
+
+  /**
+   * <p>The minimum load balancer capacity reserved.</p>
+   * @public
+   */
+  MinimumLoadBalancerCapacity?: MinimumLoadBalancerCapacity | undefined;
+
+  /**
+   * <p>Resets the capacity reservation.</p>
+   * @public
+   */
+  ResetCapacityReservation?: boolean | undefined;
+}
+
+/**
+ * @public
+ */
+export interface ModifyCapacityReservationOutput {
+  /**
+   * <p>The last time the capacity reservation was modified.</p>
+   * @public
+   */
+  LastModifiedTime?: Date | undefined;
+
+  /**
+   * <p>The amount of daily capacity decreases remaining.</p>
+   * @public
+   */
+  DecreaseRequestsRemaining?: number | undefined;
+
+  /**
+   * <p>The requested minimum capacity reservation for the load balancer</p>
+   * @public
+   */
+  MinimumLoadBalancerCapacity?: MinimumLoadBalancerCapacity | undefined;
+
+  /**
+   * <p>The state of the capacity reservation.</p>
+   * @public
+   */
+  CapacityReservationState?: ZonalCapacityReservationState[] | undefined;
+}
+
+/**
+ * <p>This operation is not allowed while a prior request has not been completed.</p>
+ * @public
+ */
+export class PriorRequestNotCompleteException extends __BaseException {
+  readonly name: "PriorRequestNotCompleteException" = "PriorRequestNotCompleteException";
+  readonly $fault: "client" = "client";
+  Message?: string | undefined;
+  /**
+   * @internal
+   */
+  constructor(opts: __ExceptionOptionType<PriorRequestNotCompleteException, __BaseException>) {
+    super({
+      name: "PriorRequestNotCompleteException",
+      $fault: "client",
+      ...opts,
+    });
+    Object.setPrototypeOf(this, PriorRequestNotCompleteException.prototype);
+    this.Message = opts.Message;
+  }
+}
+
 /**
  * @public
  */
diff --git a/clients/client-elastic-load-balancing-v2/src/protocols/Aws_query.ts b/clients/client-elastic-load-balancing-v2/src/protocols/Aws_query.ts
index a4557d8d435e4..e1b47310bb4b0 100644
--- a/clients/client-elastic-load-balancing-v2/src/protocols/Aws_query.ts
+++ b/clients/client-elastic-load-balancing-v2/src/protocols/Aws_query.ts
@@ -10,6 +10,7 @@ import {
   getArrayIfSingleItem as __getArrayIfSingleItem,
   parseBoolean as __parseBoolean,
   parseRfc3339DateTimeWithOffset as __parseRfc3339DateTimeWithOffset,
+  strictParseFloat as __strictParseFloat,
   strictParseInt32 as __strictParseInt32,
   strictParseLong as __strictParseLong,
   withBaseException,
@@ -49,6 +50,10 @@ import {
   DescribeAccountLimitsCommandInput,
   DescribeAccountLimitsCommandOutput,
 } from "../commands/DescribeAccountLimitsCommand";
+import {
+  DescribeCapacityReservationCommandInput,
+  DescribeCapacityReservationCommandOutput,
+} from "../commands/DescribeCapacityReservationCommand";
 import {
   DescribeListenerAttributesCommandInput,
   DescribeListenerAttributesCommandOutput,
@@ -105,6 +110,10 @@ import {
   GetTrustStoreRevocationContentCommandInput,
   GetTrustStoreRevocationContentCommandOutput,
 } from "../commands/GetTrustStoreRevocationContentCommand";
+import {
+  ModifyCapacityReservationCommandInput,
+  ModifyCapacityReservationCommandOutput,
+} from "../commands/ModifyCapacityReservationCommand";
 import {
   ModifyListenerAttributesCommandInput,
   ModifyListenerAttributesCommandOutput,
@@ -153,6 +162,10 @@ import {
   AvailabilityZone,
   AvailabilityZoneNotSupportedException,
   CaCertificatesBundleNotFoundException,
+  CapacityDecreaseRequestsLimitExceededException,
+  CapacityReservationPendingException,
+  CapacityReservationStatus,
+  CapacityUnitsLimitExceededException,
   Certificate,
   CertificateNotFoundException,
   Cipher,
@@ -183,6 +196,8 @@ import {
   DeregisterTargetsOutput,
   DescribeAccountLimitsInput,
   DescribeAccountLimitsOutput,
+  DescribeCapacityReservationInput,
+  DescribeCapacityReservationOutput,
   DescribeListenerAttributesInput,
   DescribeListenerAttributesOutput,
   DescribeListenerCertificatesInput,
@@ -231,6 +246,7 @@ import {
   HttpHeaderConditionConfig,
   HttpRequestMethodConditionConfig,
   IncompatibleProtocolsException,
+  InsufficientCapacityException,
   InvalidCaCertificatesBundleException,
   InvalidConfigurationRequestException,
   InvalidLoadBalancerActionException,
@@ -249,6 +265,9 @@ import {
   LoadBalancerNotFoundException,
   LoadBalancerState,
   Matcher,
+  MinimumLoadBalancerCapacity,
+  ModifyCapacityReservationInput,
+  ModifyCapacityReservationOutput,
   ModifyListenerAttributesInput,
   ModifyListenerAttributesOutput,
   ModifyListenerInput,
@@ -267,6 +286,7 @@ import {
   OperationNotPermittedException,
   PathPatternConditionConfig,
   PriorityInUseException,
+  PriorRequestNotCompleteException,
   QueryStringConditionConfig,
   QueryStringKeyValuePair,
   RedirectActionConfig,
@@ -331,6 +351,7 @@ import {
   TrustStoreNotReadyException,
   TrustStoreRevocation,
   UnsupportedProtocolException,
+  ZonalCapacityReservationState,
 } from "../models/models_0";
 
 /**
@@ -605,6 +626,23 @@ export const se_DescribeAccountLimitsCommand = async (
   return buildHttpRpcRequest(context, headers, "/", undefined, body);
 };
 
+/**
+ * serializeAws_queryDescribeCapacityReservationCommand
+ */
+export const se_DescribeCapacityReservationCommand = async (
+  input: DescribeCapacityReservationCommandInput,
+  context: __SerdeContext
+): Promise<__HttpRequest> => {
+  const headers: __HeaderBag = SHARED_HEADERS;
+  let body: any;
+  body = buildFormUrlencodedString({
+    ...se_DescribeCapacityReservationInput(input, context),
+    [_A]: _DCR,
+    [_V]: _,
+  });
+  return buildHttpRpcRequest(context, headers, "/", undefined, body);
+};
+
 /**
  * serializeAws_queryDescribeListenerAttributesCommand
  */
@@ -894,6 +932,23 @@ export const se_GetTrustStoreRevocationContentCommand = async (
   return buildHttpRpcRequest(context, headers, "/", undefined, body);
 };
 
+/**
+ * serializeAws_queryModifyCapacityReservationCommand
+ */
+export const se_ModifyCapacityReservationCommand = async (
+  input: ModifyCapacityReservationCommandInput,
+  context: __SerdeContext
+): Promise<__HttpRequest> => {
+  const headers: __HeaderBag = SHARED_HEADERS;
+  let body: any;
+  body = buildFormUrlencodedString({
+    ...se_ModifyCapacityReservationInput(input, context),
+    [_A]: _MCR,
+    [_V]: _,
+  });
+  return buildHttpRpcRequest(context, headers, "/", undefined, body);
+};
+
 /**
  * serializeAws_queryModifyListenerCommand
  */
@@ -1469,6 +1524,26 @@ export const de_DescribeAccountLimitsCommand = async (
   return response;
 };
 
+/**
+ * deserializeAws_queryDescribeCapacityReservationCommand
+ */
+export const de_DescribeCapacityReservationCommand = async (
+  output: __HttpResponse,
+  context: __SerdeContext
+): Promise<DescribeCapacityReservationCommandOutput> => {
+  if (output.statusCode >= 300) {
+    return de_CommandError(output, context);
+  }
+  const data: any = await parseBody(output.body, context);
+  let contents: any = {};
+  contents = de_DescribeCapacityReservationOutput(data.DescribeCapacityReservationResult, context);
+  const response: DescribeCapacityReservationCommandOutput = {
+    $metadata: deserializeMetadata(output),
+    ...contents,
+  };
+  return response;
+};
+
 /**
  * deserializeAws_queryDescribeListenerAttributesCommand
  */
@@ -1809,6 +1884,26 @@ export const de_GetTrustStoreRevocationContentCommand = async (
   return response;
 };
 
+/**
+ * deserializeAws_queryModifyCapacityReservationCommand
+ */
+export const de_ModifyCapacityReservationCommand = async (
+  output: __HttpResponse,
+  context: __SerdeContext
+): Promise<ModifyCapacityReservationCommandOutput> => {
+  if (output.statusCode >= 300) {
+    return de_CommandError(output, context);
+  }
+  const data: any = await parseBody(output.body, context);
+  let contents: any = {};
+  contents = de_ModifyCapacityReservationOutput(data.ModifyCapacityReservationResult, context);
+  const response: ModifyCapacityReservationCommandOutput = {
+    $metadata: deserializeMetadata(output),
+    ...contents,
+  };
+  return response;
+};
+
 /**
  * deserializeAws_queryModifyListenerCommand
  */
@@ -2272,6 +2367,21 @@ const de_CommandError = async (output: __HttpResponse, context: __SerdeContext):
     case "ResourceNotFound":
     case "com.amazonaws.elasticloadbalancingv2#ResourceNotFoundException":
       throw await de_ResourceNotFoundExceptionRes(parsedOutput, context);
+    case "CapacityDecreaseRequestLimitExceeded":
+    case "com.amazonaws.elasticloadbalancingv2#CapacityDecreaseRequestsLimitExceededException":
+      throw await de_CapacityDecreaseRequestsLimitExceededExceptionRes(parsedOutput, context);
+    case "CapacityReservationPending":
+    case "com.amazonaws.elasticloadbalancingv2#CapacityReservationPendingException":
+      throw await de_CapacityReservationPendingExceptionRes(parsedOutput, context);
+    case "CapacityUnitsLimitExceeded":
+    case "com.amazonaws.elasticloadbalancingv2#CapacityUnitsLimitExceededException":
+      throw await de_CapacityUnitsLimitExceededExceptionRes(parsedOutput, context);
+    case "InsufficientCapacity":
+    case "com.amazonaws.elasticloadbalancingv2#InsufficientCapacityException":
+      throw await de_InsufficientCapacityExceptionRes(parsedOutput, context);
+    case "PriorRequestNotComplete":
+    case "com.amazonaws.elasticloadbalancingv2#PriorRequestNotCompleteException":
+      throw await de_PriorRequestNotCompleteExceptionRes(parsedOutput, context);
     default:
       const parsedBody = parsedOutput.body;
       return throwDefaultError({
@@ -2346,6 +2456,54 @@ const de_CaCertificatesBundleNotFoundExceptionRes = async (
   return __decorateServiceException(exception, body);
 };
 
+/**
+ * deserializeAws_queryCapacityDecreaseRequestsLimitExceededExceptionRes
+ */
+const de_CapacityDecreaseRequestsLimitExceededExceptionRes = async (
+  parsedOutput: any,
+  context: __SerdeContext
+): Promise<CapacityDecreaseRequestsLimitExceededException> => {
+  const body = parsedOutput.body;
+  const deserialized: any = de_CapacityDecreaseRequestsLimitExceededException(body.Error, context);
+  const exception = new CapacityDecreaseRequestsLimitExceededException({
+    $metadata: deserializeMetadata(parsedOutput),
+    ...deserialized,
+  });
+  return __decorateServiceException(exception, body);
+};
+
+/**
+ * deserializeAws_queryCapacityReservationPendingExceptionRes
+ */
+const de_CapacityReservationPendingExceptionRes = async (
+  parsedOutput: any,
+  context: __SerdeContext
+): Promise<CapacityReservationPendingException> => {
+  const body = parsedOutput.body;
+  const deserialized: any = de_CapacityReservationPendingException(body.Error, context);
+  const exception = new CapacityReservationPendingException({
+    $metadata: deserializeMetadata(parsedOutput),
+    ...deserialized,
+  });
+  return __decorateServiceException(exception, body);
+};
+
+/**
+ * deserializeAws_queryCapacityUnitsLimitExceededExceptionRes
+ */
+const de_CapacityUnitsLimitExceededExceptionRes = async (
+  parsedOutput: any,
+  context: __SerdeContext
+): Promise<CapacityUnitsLimitExceededException> => {
+  const body = parsedOutput.body;
+  const deserialized: any = de_CapacityUnitsLimitExceededException(body.Error, context);
+  const exception = new CapacityUnitsLimitExceededException({
+    $metadata: deserializeMetadata(parsedOutput),
+    ...deserialized,
+  });
+  return __decorateServiceException(exception, body);
+};
+
 /**
  * deserializeAws_queryCertificateNotFoundExceptionRes
  */
@@ -2490,6 +2648,22 @@ const de_IncompatibleProtocolsExceptionRes = async (
   return __decorateServiceException(exception, body);
 };
 
+/**
+ * deserializeAws_queryInsufficientCapacityExceptionRes
+ */
+const de_InsufficientCapacityExceptionRes = async (
+  parsedOutput: any,
+  context: __SerdeContext
+): Promise<InsufficientCapacityException> => {
+  const body = parsedOutput.body;
+  const deserialized: any = de_InsufficientCapacityException(body.Error, context);
+  const exception = new InsufficientCapacityException({
+    $metadata: deserializeMetadata(parsedOutput),
+    ...deserialized,
+  });
+  return __decorateServiceException(exception, body);
+};
+
 /**
  * deserializeAws_queryInvalidCaCertificatesBundleExceptionRes
  */
@@ -2682,6 +2856,22 @@ const de_PriorityInUseExceptionRes = async (
   return __decorateServiceException(exception, body);
 };
 
+/**
+ * deserializeAws_queryPriorRequestNotCompleteExceptionRes
+ */
+const de_PriorRequestNotCompleteExceptionRes = async (
+  parsedOutput: any,
+  context: __SerdeContext
+): Promise<PriorRequestNotCompleteException> => {
+  const body = parsedOutput.body;
+  const deserialized: any = de_PriorRequestNotCompleteException(body.Error, context);
+  const exception = new PriorRequestNotCompleteException({
+    $metadata: deserializeMetadata(parsedOutput),
+    ...deserialized,
+  });
+  return __decorateServiceException(exception, body);
+};
+
 /**
  * deserializeAws_queryResourceInUseExceptionRes
  */
@@ -3794,6 +3984,17 @@ const se_DescribeAccountLimitsInput = (input: DescribeAccountLimitsInput, contex
   return entries;
 };
 
+/**
+ * serializeAws_queryDescribeCapacityReservationInput
+ */
+const se_DescribeCapacityReservationInput = (input: DescribeCapacityReservationInput, context: __SerdeContext): any => {
+  const entries: any = {};
+  if (input[_LBA] != null) {
+    entries[_LBA] = input[_LBA];
+  }
+  return entries;
+};
+
 /**
  * serializeAws_queryDescribeListenerAttributesInput
  */
@@ -4442,6 +4643,38 @@ const se_Matcher = (input: Matcher, context: __SerdeContext): any => {
   return entries;
 };
 
+/**
+ * serializeAws_queryMinimumLoadBalancerCapacity
+ */
+const se_MinimumLoadBalancerCapacity = (input: MinimumLoadBalancerCapacity, context: __SerdeContext): any => {
+  const entries: any = {};
+  if (input[_CU] != null) {
+    entries[_CU] = input[_CU];
+  }
+  return entries;
+};
+
+/**
+ * serializeAws_queryModifyCapacityReservationInput
+ */
+const se_ModifyCapacityReservationInput = (input: ModifyCapacityReservationInput, context: __SerdeContext): any => {
+  const entries: any = {};
+  if (input[_LBA] != null) {
+    entries[_LBA] = input[_LBA];
+  }
+  if (input[_MLBC] != null) {
+    const memberEntries = se_MinimumLoadBalancerCapacity(input[_MLBC], context);
+    Object.entries(memberEntries).forEach(([key, value]) => {
+      const loc = `MinimumLoadBalancerCapacity.${key}`;
+      entries[loc] = value;
+    });
+  }
+  if (input[_RCR] != null) {
+    entries[_RCR] = input[_RCR];
+  }
+  return entries;
+};
+
 /**
  * serializeAws_queryModifyListenerAttributesInput
  */
@@ -5821,6 +6054,62 @@ const de_CaCertificatesBundleNotFoundException = (
   return contents;
 };
 
+/**
+ * deserializeAws_queryCapacityDecreaseRequestsLimitExceededException
+ */
+const de_CapacityDecreaseRequestsLimitExceededException = (
+  output: any,
+  context: __SerdeContext
+): CapacityDecreaseRequestsLimitExceededException => {
+  const contents: any = {};
+  if (output[_Me] != null) {
+    contents[_Me] = __expectString(output[_Me]);
+  }
+  return contents;
+};
+
+/**
+ * deserializeAws_queryCapacityReservationPendingException
+ */
+const de_CapacityReservationPendingException = (
+  output: any,
+  context: __SerdeContext
+): CapacityReservationPendingException => {
+  const contents: any = {};
+  if (output[_Me] != null) {
+    contents[_Me] = __expectString(output[_Me]);
+  }
+  return contents;
+};
+
+/**
+ * deserializeAws_queryCapacityReservationStatus
+ */
+const de_CapacityReservationStatus = (output: any, context: __SerdeContext): CapacityReservationStatus => {
+  const contents: any = {};
+  if (output[_Cod] != null) {
+    contents[_Cod] = __expectString(output[_Cod]);
+  }
+  if (output[_R] != null) {
+    contents[_R] = __expectString(output[_R]);
+  }
+  return contents;
+};
+
+/**
+ * deserializeAws_queryCapacityUnitsLimitExceededException
+ */
+const de_CapacityUnitsLimitExceededException = (
+  output: any,
+  context: __SerdeContext
+): CapacityUnitsLimitExceededException => {
+  const contents: any = {};
+  if (output[_Me] != null) {
+    contents[_Me] = __expectString(output[_Me]);
+  }
+  return contents;
+};
+
 /**
  * deserializeAws_queryCertificate
  */
@@ -6036,6 +6325,31 @@ const de_DescribeAccountLimitsOutput = (output: any, context: __SerdeContext): D
   return contents;
 };
 
+/**
+ * deserializeAws_queryDescribeCapacityReservationOutput
+ */
+const de_DescribeCapacityReservationOutput = (
+  output: any,
+  context: __SerdeContext
+): DescribeCapacityReservationOutput => {
+  const contents: any = {};
+  if (output[_LMT] != null) {
+    contents[_LMT] = __expectNonNull(__parseRfc3339DateTimeWithOffset(output[_LMT]));
+  }
+  if (output[_DRR] != null) {
+    contents[_DRR] = __strictParseInt32(output[_DRR]) as number;
+  }
+  if (output[_MLBC] != null) {
+    contents[_MLBC] = de_MinimumLoadBalancerCapacity(output[_MLBC], context);
+  }
+  if (output.CapacityReservationState === "") {
+    contents[_CRS] = [];
+  } else if (output[_CRS] != null && output[_CRS][_m] != null) {
+    contents[_CRS] = de_ZonalCapacityReservationStates(__getArrayIfSingleItem(output[_CRS][_m]), context);
+  }
+  return contents;
+};
+
 /**
  * deserializeAws_queryDescribeListenerAttributesOutput
  */
@@ -6500,6 +6814,17 @@ const de_IncompatibleProtocolsException = (output: any, context: __SerdeContext)
   return contents;
 };
 
+/**
+ * deserializeAws_queryInsufficientCapacityException
+ */
+const de_InsufficientCapacityException = (output: any, context: __SerdeContext): InsufficientCapacityException => {
+  const contents: any = {};
+  if (output[_Me] != null) {
+    contents[_Me] = __expectString(output[_Me]);
+  }
+  return contents;
+};
+
 /**
  * deserializeAws_queryInvalidCaCertificatesBundleException
  */
@@ -6898,6 +7223,39 @@ const de_Matcher = (output: any, context: __SerdeContext): Matcher => {
   return contents;
 };
 
+/**
+ * deserializeAws_queryMinimumLoadBalancerCapacity
+ */
+const de_MinimumLoadBalancerCapacity = (output: any, context: __SerdeContext): MinimumLoadBalancerCapacity => {
+  const contents: any = {};
+  if (output[_CU] != null) {
+    contents[_CU] = __strictParseInt32(output[_CU]) as number;
+  }
+  return contents;
+};
+
+/**
+ * deserializeAws_queryModifyCapacityReservationOutput
+ */
+const de_ModifyCapacityReservationOutput = (output: any, context: __SerdeContext): ModifyCapacityReservationOutput => {
+  const contents: any = {};
+  if (output[_LMT] != null) {
+    contents[_LMT] = __expectNonNull(__parseRfc3339DateTimeWithOffset(output[_LMT]));
+  }
+  if (output[_DRR] != null) {
+    contents[_DRR] = __strictParseInt32(output[_DRR]) as number;
+  }
+  if (output[_MLBC] != null) {
+    contents[_MLBC] = de_MinimumLoadBalancerCapacity(output[_MLBC], context);
+  }
+  if (output.CapacityReservationState === "") {
+    contents[_CRS] = [];
+  } else if (output[_CRS] != null && output[_CRS][_m] != null) {
+    contents[_CRS] = de_ZonalCapacityReservationStates(__getArrayIfSingleItem(output[_CRS][_m]), context);
+  }
+  return contents;
+};
+
 /**
  * deserializeAws_queryModifyListenerAttributesOutput
  */
@@ -7050,6 +7408,20 @@ const de_PriorityInUseException = (output: any, context: __SerdeContext): Priori
   return contents;
 };
 
+/**
+ * deserializeAws_queryPriorRequestNotCompleteException
+ */
+const de_PriorRequestNotCompleteException = (
+  output: any,
+  context: __SerdeContext
+): PriorRequestNotCompleteException => {
+  const contents: any = {};
+  if (output[_Me] != null) {
+    contents[_Me] = __expectString(output[_Me]);
+  }
+  return contents;
+};
+
 /**
  * deserializeAws_queryQueryStringConditionConfig
  */
@@ -8027,6 +8399,34 @@ const de_UnsupportedProtocolException = (output: any, context: __SerdeContext):
   return contents;
 };
 
+/**
+ * deserializeAws_queryZonalCapacityReservationState
+ */
+const de_ZonalCapacityReservationState = (output: any, context: __SerdeContext): ZonalCapacityReservationState => {
+  const contents: any = {};
+  if (output[_St] != null) {
+    contents[_St] = de_CapacityReservationStatus(output[_St], context);
+  }
+  if (output[_AZ] != null) {
+    contents[_AZ] = __expectString(output[_AZ]);
+  }
+  if (output[_ECU] != null) {
+    contents[_ECU] = __strictParseFloat(output[_ECU]) as number;
+  }
+  return contents;
+};
+
+/**
+ * deserializeAws_queryZonalCapacityReservationStates
+ */
+const de_ZonalCapacityReservationStates = (output: any, context: __SerdeContext): ZonalCapacityReservationState[] => {
+  return (output || [])
+    .filter((e: any) => e != null)
+    .map((entry: any) => {
+      return de_ZonalCapacityReservationState(entry, context);
+    });
+};
+
 const deserializeMetadata = (output: __HttpResponse): __ResponseMetadata => ({
   httpStatusCode: output.statusCode,
   requestId:
@@ -8096,17 +8496,20 @@ const _CL = "CreateListener";
 const _CLB = "CreateLoadBalancer";
 const _COIP = "CustomerOwnedIpv4Pool";
 const _CR = "CreateRule";
+const _CRS = "CapacityReservationState";
 const _CS = "ClientSecret";
 const _CT = "ContentType";
 const _CTG = "CreateTargetGroup";
 const _CTS = "CreateTrustStore";
 const _CTr = "CreatedTime";
+const _CU = "CapacityUnits";
 const _Ci = "Ciphers";
 const _Co = "Conditions";
 const _Cod = "Code";
 const _D = "Description";
 const _DA = "DefaultActions";
 const _DAL = "DescribeAccountLimits";
+const _DCR = "DescribeCapacityReservation";
 const _DL = "DeleteListener";
 const _DLA = "DescribeListenerAttributes";
 const _DLB = "DeleteLoadBalancer";
@@ -8116,6 +8519,7 @@ const _DLC = "DescribeListenerCertificates";
 const _DLe = "DescribeListeners";
 const _DNSN = "DNSName";
 const _DR = "DeleteRule";
+const _DRR = "DecreaseRequestsRemaining";
 const _DRe = "DescribeRules";
 const _DS = "DurationSeconds";
 const _DSSLP = "DescribeSSLPolicies";
@@ -8131,6 +8535,7 @@ const _DTSR = "DescribeTrustStoreRevocations";
 const _DTSe = "DescribeTrustStores";
 const _DTe = "DescribeTags";
 const _E = "Enabled";
+const _ECU = "EffectiveCapacityUnits";
 const _EPFISN = "EnablePrefixForIpv6SourceNat";
 const _ESGIROPLT = "EnforceSecurityGroupInboundRulesOnPrivateLinkTraffic";
 const _F = "Field";
@@ -8171,15 +8576,18 @@ const _LBAo = "LoadBalancerArns";
 const _LBAoa = "LoadBalancerAddresses";
 const _LBN = "LoadBalancerName";
 const _LBT = "LoadBalancerType";
+const _LMT = "LastModifiedTime";
 const _Li = "Limits";
 const _Lo = "Location";
 const _M = "Matcher";
 const _MA = "MutualAuthentication";
 const _MB = "MessageBody";
+const _MCR = "ModifyCapacityReservation";
 const _MIE = "MitigationInEffect";
 const _ML = "ModifyListener";
 const _MLA = "ModifyListenerAttributes";
 const _MLBA = "ModifyLoadBalancerAttributes";
+const _MLBC = "MinimumLoadBalancerCapacity";
 const _MR = "ModifyRule";
 const _MTG = "ModifyTargetGroup";
 const _MTGA = "ModifyTargetGroupAttributes";
@@ -8213,6 +8621,7 @@ const _RAe = "ResourceArn";
 const _RAu = "RuleArn";
 const _RAul = "RuleArns";
 const _RC = "RedirectConfig";
+const _RCR = "ResetCapacityReservation";
 const _RCe = "RevocationContents";
 const _RI = "RevocationIds";
 const _RIe = "RevocationId";
diff --git a/codegen/sdk-codegen/aws-models/elastic-load-balancing-v2.json b/codegen/sdk-codegen/aws-models/elastic-load-balancing-v2.json
index f8c9b0f4aff32..6123ccb1f480d 100644
--- a/codegen/sdk-codegen/aws-models/elastic-load-balancing-v2.json
+++ b/codegen/sdk-codegen/aws-models/elastic-load-balancing-v2.json
@@ -813,6 +813,112 @@
     "com.amazonaws.elasticloadbalancingv2#CanonicalHostedZoneId": {
       "type": "string"
     },
+    "com.amazonaws.elasticloadbalancingv2#CapacityDecreaseRequestsLimitExceededException": {
+      "type": "structure",
+      "members": {
+        "Message": {
+          "target": "com.amazonaws.elasticloadbalancingv2#ErrorDescription"
+        }
+      },
+      "traits": {
+        "aws.protocols#awsQueryError": {
+          "code": "CapacityDecreaseRequestLimitExceeded",
+          "httpResponseCode": 400
+        },
+        "smithy.api#documentation": "<p>You've exceeded the daily capacity decrease limit for this reservation.</p>",
+        "smithy.api#error": "client",
+        "smithy.api#httpError": 400
+      }
+    },
+    "com.amazonaws.elasticloadbalancingv2#CapacityReservationPendingException": {
+      "type": "structure",
+      "members": {
+        "Message": {
+          "target": "com.amazonaws.elasticloadbalancingv2#ErrorDescription"
+        }
+      },
+      "traits": {
+        "aws.protocols#awsQueryError": {
+          "code": "CapacityReservationPending",
+          "httpResponseCode": 400
+        },
+        "smithy.api#documentation": "<p>There is a pending capacity reservation.</p>",
+        "smithy.api#error": "client",
+        "smithy.api#httpError": 400
+      }
+    },
+    "com.amazonaws.elasticloadbalancingv2#CapacityReservationStateEnum": {
+      "type": "enum",
+      "members": {
+        "PROVISIONED": {
+          "target": "smithy.api#Unit",
+          "traits": {
+            "smithy.api#enumValue": "provisioned"
+          }
+        },
+        "PENDING": {
+          "target": "smithy.api#Unit",
+          "traits": {
+            "smithy.api#enumValue": "pending"
+          }
+        },
+        "REBALANCING": {
+          "target": "smithy.api#Unit",
+          "traits": {
+            "smithy.api#enumValue": "rebalancing"
+          }
+        },
+        "FAILED": {
+          "target": "smithy.api#Unit",
+          "traits": {
+            "smithy.api#enumValue": "failed"
+          }
+        }
+      }
+    },
+    "com.amazonaws.elasticloadbalancingv2#CapacityReservationStatus": {
+      "type": "structure",
+      "members": {
+        "Code": {
+          "target": "com.amazonaws.elasticloadbalancingv2#CapacityReservationStateEnum",
+          "traits": {
+            "smithy.api#documentation": "<p>The status code.</p>"
+          }
+        },
+        "Reason": {
+          "target": "com.amazonaws.elasticloadbalancingv2#StateReason",
+          "traits": {
+            "smithy.api#documentation": "<p>The reason code for the status.</p>"
+          }
+        }
+      },
+      "traits": {
+        "smithy.api#documentation": "<p>The status of a capacity reservation.</p>"
+      }
+    },
+    "com.amazonaws.elasticloadbalancingv2#CapacityUnits": {
+      "type": "integer"
+    },
+    "com.amazonaws.elasticloadbalancingv2#CapacityUnitsDouble": {
+      "type": "double"
+    },
+    "com.amazonaws.elasticloadbalancingv2#CapacityUnitsLimitExceededException": {
+      "type": "structure",
+      "members": {
+        "Message": {
+          "target": "com.amazonaws.elasticloadbalancingv2#ErrorDescription"
+        }
+      },
+      "traits": {
+        "aws.protocols#awsQueryError": {
+          "code": "CapacityUnitsLimitExceeded",
+          "httpResponseCode": 400
+        },
+        "smithy.api#documentation": "<p>You've exceeded the capacity units limit.</p>",
+        "smithy.api#error": "client",
+        "smithy.api#httpError": 400
+      }
+    },
     "com.amazonaws.elasticloadbalancingv2#Certificate": {
       "type": "structure",
       "members": {
@@ -1796,6 +1902,9 @@
     "com.amazonaws.elasticloadbalancingv2#DNSName": {
       "type": "string"
     },
+    "com.amazonaws.elasticloadbalancingv2#DecreaseRequestsRemaining": {
+      "type": "integer"
+    },
     "com.amazonaws.elasticloadbalancingv2#Default": {
       "type": "boolean"
     },
@@ -2248,6 +2357,71 @@
         "smithy.api#output": {}
       }
     },
+    "com.amazonaws.elasticloadbalancingv2#DescribeCapacityReservation": {
+      "type": "operation",
+      "input": {
+        "target": "com.amazonaws.elasticloadbalancingv2#DescribeCapacityReservationInput"
+      },
+      "output": {
+        "target": "com.amazonaws.elasticloadbalancingv2#DescribeCapacityReservationOutput"
+      },
+      "errors": [
+        {
+          "target": "com.amazonaws.elasticloadbalancingv2#LoadBalancerNotFoundException"
+        }
+      ],
+      "traits": {
+        "smithy.api#documentation": "<p>Describes the capacity reservation status for the specified load balancer.</p>"
+      }
+    },
+    "com.amazonaws.elasticloadbalancingv2#DescribeCapacityReservationInput": {
+      "type": "structure",
+      "members": {
+        "LoadBalancerArn": {
+          "target": "com.amazonaws.elasticloadbalancingv2#LoadBalancerArn",
+          "traits": {
+            "smithy.api#clientOptional": {},
+            "smithy.api#documentation": "<p>The Amazon Resource Name (ARN) of the load balancer.</p>",
+            "smithy.api#required": {}
+          }
+        }
+      },
+      "traits": {
+        "smithy.api#input": {}
+      }
+    },
+    "com.amazonaws.elasticloadbalancingv2#DescribeCapacityReservationOutput": {
+      "type": "structure",
+      "members": {
+        "LastModifiedTime": {
+          "target": "com.amazonaws.elasticloadbalancingv2#LastModifiedTime",
+          "traits": {
+            "smithy.api#documentation": "<p>The last time the capacity reservation was modified.</p>"
+          }
+        },
+        "DecreaseRequestsRemaining": {
+          "target": "com.amazonaws.elasticloadbalancingv2#DecreaseRequestsRemaining",
+          "traits": {
+            "smithy.api#documentation": "<p>The amount of daily capacity decreases remaining.</p>"
+          }
+        },
+        "MinimumLoadBalancerCapacity": {
+          "target": "com.amazonaws.elasticloadbalancingv2#MinimumLoadBalancerCapacity",
+          "traits": {
+            "smithy.api#documentation": "<p>The requested minimum capacity reservation for the load balancer</p>"
+          }
+        },
+        "CapacityReservationState": {
+          "target": "com.amazonaws.elasticloadbalancingv2#ZonalCapacityReservationStates",
+          "traits": {
+            "smithy.api#documentation": "<p>The state of the capacity reservation.</p>"
+          }
+        }
+      },
+      "traits": {
+        "smithy.api#output": {}
+      }
+    },
     "com.amazonaws.elasticloadbalancingv2#DescribeListenerAttributes": {
       "type": "operation",
       "input": {
@@ -3893,6 +4067,9 @@
         {
           "target": "com.amazonaws.elasticloadbalancingv2#DescribeAccountLimits"
         },
+        {
+          "target": "com.amazonaws.elasticloadbalancingv2#DescribeCapacityReservation"
+        },
         {
           "target": "com.amazonaws.elasticloadbalancingv2#DescribeListenerAttributes"
         },
@@ -3944,6 +4121,9 @@
         {
           "target": "com.amazonaws.elasticloadbalancingv2#GetTrustStoreRevocationContent"
         },
+        {
+          "target": "com.amazonaws.elasticloadbalancingv2#ModifyCapacityReservation"
+        },
         {
           "target": "com.amazonaws.elasticloadbalancingv2#ModifyListener"
         },
@@ -5430,6 +5610,23 @@
         "smithy.api#httpError": 400
       }
     },
+    "com.amazonaws.elasticloadbalancingv2#InsufficientCapacityException": {
+      "type": "structure",
+      "members": {
+        "Message": {
+          "target": "com.amazonaws.elasticloadbalancingv2#ErrorDescription"
+        }
+      },
+      "traits": {
+        "aws.protocols#awsQueryError": {
+          "code": "InsufficientCapacity",
+          "httpResponseCode": 500
+        },
+        "smithy.api#documentation": "<p>There is insufficient capacity to reserve.</p>",
+        "smithy.api#error": "server",
+        "smithy.api#httpError": 500
+      }
+    },
     "com.amazonaws.elasticloadbalancingv2#InvalidCaCertificatesBundleException": {
       "type": "structure",
       "members": {
@@ -5595,6 +5792,9 @@
     "com.amazonaws.elasticloadbalancingv2#IsDefault": {
       "type": "boolean"
     },
+    "com.amazonaws.elasticloadbalancingv2#LastModifiedTime": {
+      "type": "timestamp"
+    },
     "com.amazonaws.elasticloadbalancingv2#Limit": {
       "type": "structure",
       "members": {
@@ -6112,6 +6312,20 @@
     "com.amazonaws.elasticloadbalancingv2#Max": {
       "type": "string"
     },
+    "com.amazonaws.elasticloadbalancingv2#MinimumLoadBalancerCapacity": {
+      "type": "structure",
+      "members": {
+        "CapacityUnits": {
+          "target": "com.amazonaws.elasticloadbalancingv2#CapacityUnits",
+          "traits": {
+            "smithy.api#documentation": "<p>The number of capacity units.</p>"
+          }
+        }
+      },
+      "traits": {
+        "smithy.api#documentation": "<p>The minimum capacity for a load balancer.</p>"
+      }
+    },
     "com.amazonaws.elasticloadbalancingv2#MitigationInEffectEnum": {
       "type": "enum",
       "members": {
@@ -6132,6 +6346,104 @@
     "com.amazonaws.elasticloadbalancingv2#Mode": {
       "type": "string"
     },
+    "com.amazonaws.elasticloadbalancingv2#ModifyCapacityReservation": {
+      "type": "operation",
+      "input": {
+        "target": "com.amazonaws.elasticloadbalancingv2#ModifyCapacityReservationInput"
+      },
+      "output": {
+        "target": "com.amazonaws.elasticloadbalancingv2#ModifyCapacityReservationOutput"
+      },
+      "errors": [
+        {
+          "target": "com.amazonaws.elasticloadbalancingv2#CapacityDecreaseRequestsLimitExceededException"
+        },
+        {
+          "target": "com.amazonaws.elasticloadbalancingv2#CapacityReservationPendingException"
+        },
+        {
+          "target": "com.amazonaws.elasticloadbalancingv2#CapacityUnitsLimitExceededException"
+        },
+        {
+          "target": "com.amazonaws.elasticloadbalancingv2#InsufficientCapacityException"
+        },
+        {
+          "target": "com.amazonaws.elasticloadbalancingv2#InvalidConfigurationRequestException"
+        },
+        {
+          "target": "com.amazonaws.elasticloadbalancingv2#LoadBalancerNotFoundException"
+        },
+        {
+          "target": "com.amazonaws.elasticloadbalancingv2#OperationNotPermittedException"
+        },
+        {
+          "target": "com.amazonaws.elasticloadbalancingv2#PriorRequestNotCompleteException"
+        }
+      ],
+      "traits": {
+        "smithy.api#documentation": "<p>Modifies the capacity reservation of the specified load balancer.</p>\n         <p>When modifying capacity reservation, you must include at least one <code>MinimumLoadBalancerCapacity</code> \n      or <code>ResetCapacityReservation</code>.</p>"
+      }
+    },
+    "com.amazonaws.elasticloadbalancingv2#ModifyCapacityReservationInput": {
+      "type": "structure",
+      "members": {
+        "LoadBalancerArn": {
+          "target": "com.amazonaws.elasticloadbalancingv2#LoadBalancerArn",
+          "traits": {
+            "smithy.api#clientOptional": {},
+            "smithy.api#documentation": "<p>The Amazon Resource Name (ARN) of the load balancer.</p>",
+            "smithy.api#required": {}
+          }
+        },
+        "MinimumLoadBalancerCapacity": {
+          "target": "com.amazonaws.elasticloadbalancingv2#MinimumLoadBalancerCapacity",
+          "traits": {
+            "smithy.api#documentation": "<p>The minimum load balancer capacity reserved.</p>"
+          }
+        },
+        "ResetCapacityReservation": {
+          "target": "com.amazonaws.elasticloadbalancingv2#ResetCapacityReservation",
+          "traits": {
+            "smithy.api#documentation": "<p>Resets the capacity reservation.</p>"
+          }
+        }
+      },
+      "traits": {
+        "smithy.api#input": {}
+      }
+    },
+    "com.amazonaws.elasticloadbalancingv2#ModifyCapacityReservationOutput": {
+      "type": "structure",
+      "members": {
+        "LastModifiedTime": {
+          "target": "com.amazonaws.elasticloadbalancingv2#LastModifiedTime",
+          "traits": {
+            "smithy.api#documentation": "<p>The last time the capacity reservation was modified.</p>"
+          }
+        },
+        "DecreaseRequestsRemaining": {
+          "target": "com.amazonaws.elasticloadbalancingv2#DecreaseRequestsRemaining",
+          "traits": {
+            "smithy.api#documentation": "<p>The amount of daily capacity decreases remaining.</p>"
+          }
+        },
+        "MinimumLoadBalancerCapacity": {
+          "target": "com.amazonaws.elasticloadbalancingv2#MinimumLoadBalancerCapacity",
+          "traits": {
+            "smithy.api#documentation": "<p>The requested minimum capacity reservation for the load balancer</p>"
+          }
+        },
+        "CapacityReservationState": {
+          "target": "com.amazonaws.elasticloadbalancingv2#ZonalCapacityReservationStates",
+          "traits": {
+            "smithy.api#documentation": "<p>The state of the capacity reservation.</p>"
+          }
+        }
+      },
+      "traits": {
+        "smithy.api#output": {}
+      }
+    },
     "com.amazonaws.elasticloadbalancingv2#ModifyListener": {
       "type": "operation",
       "input": {
@@ -7118,6 +7430,23 @@
         }
       }
     },
+    "com.amazonaws.elasticloadbalancingv2#PriorRequestNotCompleteException": {
+      "type": "structure",
+      "members": {
+        "Message": {
+          "target": "com.amazonaws.elasticloadbalancingv2#ErrorDescription"
+        }
+      },
+      "traits": {
+        "aws.protocols#awsQueryError": {
+          "code": "PriorRequestNotComplete",
+          "httpResponseCode": 429
+        },
+        "smithy.api#documentation": "<p>This operation is not allowed while a prior request has not been completed.</p>",
+        "smithy.api#error": "client",
+        "smithy.api#httpError": 429
+      }
+    },
     "com.amazonaws.elasticloadbalancingv2#PriorityInUseException": {
       "type": "structure",
       "members": {
@@ -7595,6 +7924,9 @@
         "smithy.api#output": {}
       }
     },
+    "com.amazonaws.elasticloadbalancingv2#ResetCapacityReservation": {
+      "type": "boolean"
+    },
     "com.amazonaws.elasticloadbalancingv2#ResourceArn": {
       "type": "string"
     },
@@ -8182,6 +8514,9 @@
         {
           "target": "com.amazonaws.elasticloadbalancingv2#AvailabilityZoneNotSupportedException"
         },
+        {
+          "target": "com.amazonaws.elasticloadbalancingv2#CapacityReservationPendingException"
+        },
         {
           "target": "com.amazonaws.elasticloadbalancingv2#InvalidConfigurationRequestException"
         },
@@ -9592,6 +9927,38 @@
     "com.amazonaws.elasticloadbalancingv2#VpcId": {
       "type": "string"
     },
+    "com.amazonaws.elasticloadbalancingv2#ZonalCapacityReservationState": {
+      "type": "structure",
+      "members": {
+        "State": {
+          "target": "com.amazonaws.elasticloadbalancingv2#CapacityReservationStatus",
+          "traits": {
+            "smithy.api#documentation": "<p>The state of the capacity reservation.</p>"
+          }
+        },
+        "AvailabilityZone": {
+          "target": "com.amazonaws.elasticloadbalancingv2#ZoneName",
+          "traits": {
+            "smithy.api#documentation": "<p>Information about the availability zone.</p>"
+          }
+        },
+        "EffectiveCapacityUnits": {
+          "target": "com.amazonaws.elasticloadbalancingv2#CapacityUnitsDouble",
+          "traits": {
+            "smithy.api#documentation": "<p>The number of effective capacity units.</p>"
+          }
+        }
+      },
+      "traits": {
+        "smithy.api#documentation": "<p>The capacity reservation status for each availability zone.</p>"
+      }
+    },
+    "com.amazonaws.elasticloadbalancingv2#ZonalCapacityReservationStates": {
+      "type": "list",
+      "member": {
+        "target": "com.amazonaws.elasticloadbalancingv2#ZonalCapacityReservationState"
+      }
+    },
     "com.amazonaws.elasticloadbalancingv2#ZoneName": {
       "type": "string"
     }