diff --git a/clients/client-redshift/src/models/models_0.ts b/clients/client-redshift/src/models/models_0.ts
index c14e7dd0344c..c9341fd7e2d1 100644
--- a/clients/client-redshift/src/models/models_0.ts
+++ b/clients/client-redshift/src/models/models_0.ts
@@ -594,7 +594,7 @@ export interface AquaConfiguration {
 export interface AssociateDataShareConsumerMessage {
   /**
    * @public
-   * <p>The Amazon Resource Name (ARN) of the datashare that the consumer is to use with the account or the namespace.</p>
+   * <p>The Amazon Resource Name (ARN) of the datashare that the consumer is to use.</p>
    */
   DataShareArn: string | undefined;
 
@@ -606,7 +606,7 @@ export interface AssociateDataShareConsumerMessage {
 
   /**
    * @public
-   * <p>The Amazon Resource Name (ARN) of the consumer that is associated with the
+   * <p>The Amazon Resource Name (ARN) of the consumer namespace associated with the
    *             datashare.</p>
    */
   ConsumerArn?: string;
@@ -698,13 +698,13 @@ export interface DataShareAssociation {
 export interface DataShare {
   /**
    * @public
-   * <p>An Amazon Resource Name (ARN) that references the datashare that is owned by a specific namespace of the producer cluster. A datashare ARN is in the <code>arn:aws:redshift:\{region\}:\{account-id\}:\{datashare\}:\{namespace-guid\}/\{datashare-name\}</code> format.</p>
+   * <p>The Amazon Resource Name (ARN) of the datashare that the consumer is to use.</p>
    */
   DataShareArn?: string;
 
   /**
    * @public
-   * <p>The Amazon Resource Name (ARN) of the producer.</p>
+   * <p>The Amazon Resource Name (ARN) of the producer namespace.</p>
    */
   ProducerArn?: string;
 
@@ -1204,7 +1204,7 @@ export class InvalidClusterSecurityGroupStateFault extends __BaseException {
 export interface AuthorizeDataShareMessage {
   /**
    * @public
-   * <p>The Amazon Resource Name (ARN) of the datashare that producers are to authorize
+   * <p>The Amazon Resource Name (ARN) of the datashare namespace that producers are to authorize
    *             sharing for.</p>
    */
   DataShareArn: string | undefined;
@@ -1424,9 +1424,19 @@ export interface AuthorizeSnapshotAccessMessage {
 
   /**
    * @public
-   * <p>The identifier of the cluster the snapshot was created from. This parameter is
-   *             required if your IAM user has a policy containing a snapshot resource element that
-   *             specifies anything other than * for the cluster name.</p>
+   * <p>The identifier of the cluster the snapshot was created from.</p>
+   *          <ul>
+   *             <li>
+   *                <p>
+   *                   <i>If the snapshot to access doesn't exist and the associated IAM policy doesn't allow access to all (*) snapshots</i> -  This parameter is required. Otherwise, permissions
+   *                 aren't available to check if the snapshot exists.</p>
+   *             </li>
+   *             <li>
+   *                <p>
+   *                   <i>If the snapshot to access exists</i> - This parameter isn't required. Redshift can retrieve the cluster identifier and use it to
+   *                 validate snapshot authorization.</p>
+   *             </li>
+   *          </ul>
    */
   SnapshotClusterIdentifier?: string;
 
@@ -4640,8 +4650,17 @@ export interface CreateClusterMessage {
    *             connections.</p>
    *          <p>Default: <code>5439</code>
    *          </p>
-   *          <p>Valid Values: <code>1150-65535</code>
-   *          </p>
+   *          <p>Valid Values:
+   *         </p>
+   *          <ul>
+   *             <li>
+   *                <p>For clusters with ra3 nodes - Select a port within the ranges <code>5431-5455</code> or <code>8191-8215</code>. (If you have an existing cluster
+   *                 with ra3 nodes, it isn't required that you change the port to these ranges.)</p>
+   *             </li>
+   *             <li>
+   *                <p>For clusters with ds2 or dc2 nodes - Select a port within the range <code>1150-65535</code>.</p>
+   *             </li>
+   *          </ul>
    */
   Port?: number;
 
@@ -7565,7 +7584,7 @@ export type DataShareStatusForProducer = (typeof DataShareStatusForProducer)[key
 export interface DeauthorizeDataShareMessage {
   /**
    * @public
-   * <p>The Amazon Resource Name (ARN) of the datashare to remove authorization from.</p>
+   * <p>The namespace Amazon Resource Name (ARN) of the datashare to remove authorization from.</p>
    */
   DataShareArn: string | undefined;
 
diff --git a/clients/client-redshift/src/models/models_1.ts b/clients/client-redshift/src/models/models_1.ts
index 6fd99a2361d1..b54fcb0ee3cf 100644
--- a/clients/client-redshift/src/models/models_1.ts
+++ b/clients/client-redshift/src/models/models_1.ts
@@ -131,7 +131,7 @@ export interface DescribeCustomDomainAssociationsMessage {
 export interface DescribeDataSharesMessage {
   /**
    * @public
-   * <p>The identifier of the datashare to describe details of.</p>
+   * <p>The Amazon resource name (ARN) of the datashare to describe details of.</p>
    */
   DataShareArn?: string;
 
@@ -174,7 +174,7 @@ export interface DescribeDataSharesResult {
 export interface DescribeDataSharesForConsumerMessage {
   /**
    * @public
-   * <p>The Amazon Resource Name (ARN) of the consumer that returns in the list of datashares.</p>
+   * <p>The Amazon Resource Name (ARN) of the consumer namespace that returns in the list of datashares.</p>
    */
   ConsumerArn?: string;
 
@@ -234,7 +234,7 @@ export interface DescribeDataSharesForConsumerResult {
 export interface DescribeDataSharesForProducerMessage {
   /**
    * @public
-   * <p>The Amazon Resource Name (ARN) of the producer that returns in the list of datashares.</p>
+   * <p>The Amazon Resource Name (ARN) of the producer namespace that returns in the list of datashares.</p>
    */
   ProducerArn?: string;
 
@@ -2759,7 +2759,7 @@ export class SnapshotCopyAlreadyDisabledFault extends __BaseException {
 export interface DisassociateDataShareConsumerMessage {
   /**
    * @public
-   * <p>The Amazon Resource Name (ARN) of the datashare to remove association for. </p>
+   * <p>The Amazon Resource Name (ARN) of the datashare to remove association for.</p>
    */
   DataShareArn: string | undefined;
 
@@ -2772,7 +2772,7 @@ export interface DisassociateDataShareConsumerMessage {
 
   /**
    * @public
-   * <p>The Amazon Resource Name (ARN) of the consumer that association for
+   * <p>The Amazon Resource Name (ARN) of the consumer namespace that association for
    *             the datashare is removed from.</p>
    */
   ConsumerArn?: string;
@@ -4098,6 +4098,17 @@ export interface ModifyClusterMessage {
   /**
    * @public
    * <p>The option to change the port of an Amazon Redshift cluster.</p>
+   *          <p>Valid Values:
+   *         </p>
+   *          <ul>
+   *             <li>
+   *                <p>For clusters with ra3 nodes - Select a port within the ranges <code>5431-5455</code> or <code>8191-8215</code>. (If you have an existing cluster
+   *                 with ra3 nodes, it isn't required that you change the port to these ranges.)</p>
+   *             </li>
+   *             <li>
+   *                <p>For clusters with ds2 or dc2 nodes - Select a port within the range <code>1150-65535</code>.</p>
+   *             </li>
+   *          </ul>
    */
   Port?: number;
 
@@ -5074,7 +5085,8 @@ export interface RestoreFromClusterSnapshotMessage {
    * @public
    * <p>The port number on which the cluster accepts connections.</p>
    *          <p>Default: The same port as the original cluster.</p>
-   *          <p>Constraints: Must be between <code>1115</code> and <code>65535</code>.</p>
+   *          <p>Valid values: For clusters with ds2 or dc2 nodes, must be within the range <code>1150</code>-<code>65535</code>. For clusters with ra3 nodes, must be
+   *             within the ranges <code>5431</code>-<code>5455</code> or <code>8191</code>-<code>8215</code>.</p>
    */
   Port?: number;
 
diff --git a/codegen/sdk-codegen/aws-models/redshift.json b/codegen/sdk-codegen/aws-models/redshift.json
index 16f09cfb1b91..71851ca82e63 100644
--- a/codegen/sdk-codegen/aws-models/redshift.json
+++ b/codegen/sdk-codegen/aws-models/redshift.json
@@ -338,7 +338,7 @@
           "target": "com.amazonaws.redshift#String",
           "traits": {
             "smithy.api#clientOptional": {},
-            "smithy.api#documentation": "<p>The Amazon Resource Name (ARN) of the datashare that the consumer is to use with the account or the namespace.</p>",
+            "smithy.api#documentation": "<p>The Amazon Resource Name (ARN) of the datashare that the consumer is to use.</p>",
             "smithy.api#required": {}
           }
         },
@@ -351,7 +351,7 @@
         "ConsumerArn": {
           "target": "com.amazonaws.redshift#String",
           "traits": {
-            "smithy.api#documentation": "<p>The Amazon Resource Name (ARN) of the consumer that is associated with the\n            datashare.</p>"
+            "smithy.api#documentation": "<p>The Amazon Resource Name (ARN) of the consumer namespace associated with the\n            datashare.</p>"
           }
         },
         "ConsumerRegion": {
@@ -707,7 +707,7 @@
           "target": "com.amazonaws.redshift#String",
           "traits": {
             "smithy.api#clientOptional": {},
-            "smithy.api#documentation": "<p>The Amazon Resource Name (ARN) of the datashare that producers are to authorize\n            sharing for.</p>",
+            "smithy.api#documentation": "<p>The Amazon Resource Name (ARN) of the datashare namespace that producers are to authorize\n            sharing for.</p>",
             "smithy.api#required": {}
           }
         },
@@ -843,7 +843,7 @@
         "SnapshotClusterIdentifier": {
           "target": "com.amazonaws.redshift#String",
           "traits": {
-            "smithy.api#documentation": "<p>The identifier of the cluster the snapshot was created from. This parameter is\n            required if your IAM user has a policy containing a snapshot resource element that\n            specifies anything other than * for the cluster name.</p>"
+            "smithy.api#documentation": "<p>The identifier of the cluster the snapshot was created from.</p>\n         <ul>\n            <li>\n               <p>\n                  <i>If the snapshot to access doesn't exist and the associated IAM policy doesn't allow access to all (*) snapshots</i> -  This parameter is required. Otherwise, permissions \n                aren't available to check if the snapshot exists.</p>\n            </li>\n            <li>\n               <p>\n                  <i>If the snapshot to access exists</i> - This parameter isn't required. Redshift can retrieve the cluster identifier and use it to \n                validate snapshot authorization.</p>\n            </li>\n         </ul>"
           }
         },
         "AccountWithRestoreAccess": {
@@ -2883,7 +2883,7 @@
         "Port": {
           "target": "com.amazonaws.redshift#IntegerOptional",
           "traits": {
-            "smithy.api#documentation": "<p>The port number on which the cluster accepts incoming connections.</p>\n         <p>The cluster is accessible only via the JDBC and ODBC connection strings. Part of\n            the connection string requires the port on which the cluster will listen for incoming\n            connections.</p>\n         <p>Default: <code>5439</code>\n         </p>\n         <p>Valid Values: <code>1150-65535</code>\n         </p>"
+            "smithy.api#documentation": "<p>The port number on which the cluster accepts incoming connections.</p>\n         <p>The cluster is accessible only via the JDBC and ODBC connection strings. Part of\n            the connection string requires the port on which the cluster will listen for incoming\n            connections.</p>\n         <p>Default: <code>5439</code>\n         </p>\n         <p>Valid Values:\n        </p>\n         <ul>\n            <li>\n               <p>For clusters with ra3 nodes - Select a port within the ranges <code>5431-5455</code> or <code>8191-8215</code>. (If you have an existing cluster \n                with ra3 nodes, it isn't required that you change the port to these ranges.)</p>\n            </li>\n            <li>\n               <p>For clusters with ds2 or dc2 nodes - Select a port within the range <code>1150-65535</code>.</p>\n            </li>\n         </ul>"
           }
         },
         "ClusterVersion": {
@@ -4406,13 +4406,13 @@
         "DataShareArn": {
           "target": "com.amazonaws.redshift#String",
           "traits": {
-            "smithy.api#documentation": "<p>An Amazon Resource Name (ARN) that references the datashare that is owned by a specific namespace of the producer cluster. A datashare ARN is in the <code>arn:aws:redshift:{region}:{account-id}:{datashare}:{namespace-guid}/{datashare-name}</code> format.</p>"
+            "smithy.api#documentation": "<p>The Amazon Resource Name (ARN) of the datashare that the consumer is to use.</p>"
           }
         },
         "ProducerArn": {
           "target": "com.amazonaws.redshift#String",
           "traits": {
-            "smithy.api#documentation": "<p>The Amazon Resource Name (ARN) of the producer.</p>"
+            "smithy.api#documentation": "<p>The Amazon Resource Name (ARN) of the producer namespace.</p>"
           }
         },
         "AllowPubliclyAccessibleConsumers": {
@@ -4667,7 +4667,7 @@
           "target": "com.amazonaws.redshift#String",
           "traits": {
             "smithy.api#clientOptional": {},
-            "smithy.api#documentation": "<p>The Amazon Resource Name (ARN) of the datashare to remove authorization from.</p>",
+            "smithy.api#documentation": "<p>The namespace Amazon Resource Name (ARN) of the datashare to remove authorization from.</p>",
             "smithy.api#required": {}
           }
         },
@@ -6500,7 +6500,7 @@
         "ConsumerArn": {
           "target": "com.amazonaws.redshift#String",
           "traits": {
-            "smithy.api#documentation": "<p>The Amazon Resource Name (ARN) of the consumer that returns in the list of datashares.</p>"
+            "smithy.api#documentation": "<p>The Amazon Resource Name (ARN) of the consumer namespace that returns in the list of datashares.</p>"
           }
         },
         "Status": {
@@ -6575,7 +6575,7 @@
         "ProducerArn": {
           "target": "com.amazonaws.redshift#String",
           "traits": {
-            "smithy.api#documentation": "<p>The Amazon Resource Name (ARN) of the producer that returns in the list of datashares.</p>"
+            "smithy.api#documentation": "<p>The Amazon Resource Name (ARN) of the producer namespace that returns in the list of datashares.</p>"
           }
         },
         "Status": {
@@ -6627,7 +6627,7 @@
         "DataShareArn": {
           "target": "com.amazonaws.redshift#String",
           "traits": {
-            "smithy.api#documentation": "<p>The identifier of the datashare to describe details of.</p>"
+            "smithy.api#documentation": "<p>The Amazon resource name (ARN) of the datashare to describe details of.</p>"
           }
         },
         "MaxRecords": {
@@ -8348,7 +8348,7 @@
           "target": "com.amazonaws.redshift#String",
           "traits": {
             "smithy.api#clientOptional": {},
-            "smithy.api#documentation": "<p>The Amazon Resource Name (ARN) of the datashare to remove association for. </p>",
+            "smithy.api#documentation": "<p>The Amazon Resource Name (ARN) of the datashare to remove association for.</p>",
             "smithy.api#required": {}
           }
         },
@@ -8361,7 +8361,7 @@
         "ConsumerArn": {
           "target": "com.amazonaws.redshift#String",
           "traits": {
-            "smithy.api#documentation": "<p>The Amazon Resource Name (ARN) of the consumer that association for\n            the datashare is removed from.</p>"
+            "smithy.api#documentation": "<p>The Amazon Resource Name (ARN) of the consumer namespace that association for\n            the datashare is removed from.</p>"
           }
         },
         "ConsumerRegion": {
@@ -11583,7 +11583,7 @@
         "Port": {
           "target": "com.amazonaws.redshift#IntegerOptional",
           "traits": {
-            "smithy.api#documentation": "<p>The option to change the port of an Amazon Redshift cluster.</p>"
+            "smithy.api#documentation": "<p>The option to change the port of an Amazon Redshift cluster.</p>\n         <p>Valid Values:\n        </p>\n         <ul>\n            <li>\n               <p>For clusters with ra3 nodes - Select a port within the ranges <code>5431-5455</code> or <code>8191-8215</code>. (If you have an existing cluster \n                with ra3 nodes, it isn't required that you change the port to these ranges.)</p>\n            </li>\n            <li>\n               <p>For clusters with ds2 or dc2 nodes - Select a port within the range <code>1150-65535</code>.</p>\n            </li>\n         </ul>"
           }
         },
         "ManageMasterPassword": {
@@ -16185,7 +16185,7 @@
         "Port": {
           "target": "com.amazonaws.redshift#IntegerOptional",
           "traits": {
-            "smithy.api#documentation": "<p>The port number on which the cluster accepts connections.</p>\n         <p>Default: The same port as the original cluster.</p>\n         <p>Constraints: Must be between <code>1115</code> and <code>65535</code>.</p>"
+            "smithy.api#documentation": "<p>The port number on which the cluster accepts connections.</p>\n         <p>Default: The same port as the original cluster.</p>\n         <p>Valid values: For clusters with ds2 or dc2 nodes, must be within the range <code>1150</code>-<code>65535</code>. For clusters with ra3 nodes, must be \n            within the ranges <code>5431</code>-<code>5455</code> or <code>8191</code>-<code>8215</code>.</p>"
           }
         },
         "AvailabilityZone": {