diff --git a/clients/client-ec2/src/commands/DescribeNetworkInterfaceAttributeCommand.ts b/clients/client-ec2/src/commands/DescribeNetworkInterfaceAttributeCommand.ts
index 1e466f0df653..c19d0e59b179 100644
--- a/clients/client-ec2/src/commands/DescribeNetworkInterfaceAttributeCommand.ts
+++ b/clients/client-ec2/src/commands/DescribeNetworkInterfaceAttributeCommand.ts
@@ -40,7 +40,7 @@ export interface DescribeNetworkInterfaceAttributeCommandOutput
  * // const { EC2Client, DescribeNetworkInterfaceAttributeCommand } = require("@aws-sdk/client-ec2"); // CommonJS import
  * const client = new EC2Client(config);
  * const input = { // DescribeNetworkInterfaceAttributeRequest
- *   Attribute: "description" || "groupSet" || "sourceDestCheck" || "attachment",
+ *   Attribute: "description" || "groupSet" || "sourceDestCheck" || "attachment" || "associatePublicIpAddress",
  *   DryRun: true || false,
  *   NetworkInterfaceId: "STRING_VALUE", // required
  * };
@@ -76,6 +76,7 @@ export interface DescribeNetworkInterfaceAttributeCommandOutput
  * //   SourceDestCheck: { // AttributeBooleanValue
  * //     Value: true || false,
  * //   },
+ * //   AssociatePublicIpAddress: true || false,
  * // };
  *
  * ```
diff --git a/clients/client-ec2/src/commands/ModifyNetworkInterfaceAttributeCommand.ts b/clients/client-ec2/src/commands/ModifyNetworkInterfaceAttributeCommand.ts
index f3bca59c8928..e730fe2eee24 100644
--- a/clients/client-ec2/src/commands/ModifyNetworkInterfaceAttributeCommand.ts
+++ b/clients/client-ec2/src/commands/ModifyNetworkInterfaceAttributeCommand.ts
@@ -67,6 +67,7 @@ export interface ModifyNetworkInterfaceAttributeCommandOutput extends __Metadata
  *     UdpStreamTimeout: Number("int"),
  *     UdpTimeout: Number("int"),
  *   },
+ *   AssociatePublicIpAddress: true || false,
  * };
  * const command = new ModifyNetworkInterfaceAttributeCommand(input);
  * const response = await client.send(command);
diff --git a/clients/client-ec2/src/models/models_4.ts b/clients/client-ec2/src/models/models_4.ts
index 39885044c6d1..33e13f533ca1 100644
--- a/clients/client-ec2/src/models/models_4.ts
+++ b/clients/client-ec2/src/models/models_4.ts
@@ -7539,6 +7539,7 @@ export interface DescribeNetworkInsightsPathsResult {
  * @enum
  */
 export const NetworkInterfaceAttribute = {
+  associatePublicIpAddress: "associatePublicIpAddress",
   attachment: "attachment",
   description: "description",
   groupSet: "groupSet",
@@ -7610,6 +7611,13 @@ export interface DescribeNetworkInterfaceAttributeResult {
    * @public
    */
   SourceDestCheck?: AttributeBooleanValue;
+
+  /**
+   * <p>Indicates whether to assign a public IPv4 address to a network interface.
+   *             This option can be enabled for any network interface but will only apply to the primary network interface (eth0).</p>
+   * @public
+   */
+  AssociatePublicIpAddress?: boolean;
 }
 
 /**
diff --git a/clients/client-ec2/src/models/models_6.ts b/clients/client-ec2/src/models/models_6.ts
index df966341f912..e6a5a6b10161 100644
--- a/clients/client-ec2/src/models/models_6.ts
+++ b/clients/client-ec2/src/models/models_6.ts
@@ -6443,6 +6443,13 @@ export interface ModifyNetworkInterfaceAttributeRequest {
    * @public
    */
   ConnectionTrackingSpecification?: ConnectionTrackingSpecificationRequest;
+
+  /**
+   * <p>Indicates whether to assign a public IPv4 address to a network interface.
+   *             This option can be enabled for any network interface but will only apply to the primary network interface (eth0).</p>
+   * @public
+   */
+  AssociatePublicIpAddress?: boolean;
 }
 
 /**
diff --git a/clients/client-ec2/src/protocols/Aws_ec2.ts b/clients/client-ec2/src/protocols/Aws_ec2.ts
index 676d7f383ee7..4f1f6dcfd6f8 100644
--- a/clients/client-ec2/src/protocols/Aws_ec2.ts
+++ b/clients/client-ec2/src/protocols/Aws_ec2.ts
@@ -47489,6 +47489,9 @@ const se_ModifyNetworkInterfaceAttributeRequest = (
       entries[loc] = value;
     });
   }
+  if (input[_APIAs] != null) {
+    entries[_APIAs] = input[_APIAs];
+  }
   return entries;
 };
 
@@ -62722,6 +62725,9 @@ const de_DescribeNetworkInterfaceAttributeResult = (
   if (output[_sDC] != null) {
     contents[_SDC] = de_AttributeBooleanValue(output[_sDC], context);
   }
+  if (output[_aPIA] != null) {
+    contents[_APIAs] = __parseBoolean(output[_aPIA]);
+  }
   return contents;
 };
 
diff --git a/codegen/sdk-codegen/aws-models/ec2.json b/codegen/sdk-codegen/aws-models/ec2.json
index e504d591439a..3e91f71e4183 100644
--- a/codegen/sdk-codegen/aws-models/ec2.json
+++ b/codegen/sdk-codegen/aws-models/ec2.json
@@ -35162,6 +35162,14 @@
             "smithy.api#documentation": "<p>Indicates whether source/destination checking is enabled.</p>",
             "smithy.api#xmlName": "sourceDestCheck"
           }
+        },
+        "AssociatePublicIpAddress": {
+          "target": "com.amazonaws.ec2#Boolean",
+          "traits": {
+            "aws.protocols#ec2QueryName": "AssociatePublicIpAddress",
+            "smithy.api#documentation": "<p>Indicates whether to assign a public IPv4 address to a network interface. \n            This option can be enabled for any network interface but will only apply to the primary network interface (eth0).</p>",
+            "smithy.api#xmlName": "associatePublicIpAddress"
+          }
         }
       },
       "traits": {
@@ -76259,6 +76267,12 @@
           "traits": {
             "smithy.api#documentation": "<p>A connection tracking specification.</p>"
           }
+        },
+        "AssociatePublicIpAddress": {
+          "target": "com.amazonaws.ec2#Boolean",
+          "traits": {
+            "smithy.api#documentation": "<p>Indicates whether to assign a public IPv4 address to a network interface. \n            This option can be enabled for any network interface but will only apply to the primary network interface (eth0).</p>"
+          }
         }
       },
       "traits": {
@@ -81182,6 +81196,12 @@
           "traits": {
             "smithy.api#enumValue": "attachment"
           }
+        },
+        "associatePublicIpAddress": {
+          "target": "smithy.api#Unit",
+          "traits": {
+            "smithy.api#enumValue": "associatePublicIpAddress"
+          }
         }
       }
     },