diff --git a/clients/client-mediapackagev2/src/commands/CreateChannelCommand.ts b/clients/client-mediapackagev2/src/commands/CreateChannelCommand.ts
index bf9a01e2df62..f78c519ec2cd 100644
--- a/clients/client-mediapackagev2/src/commands/CreateChannelCommand.ts
+++ b/clients/client-mediapackagev2/src/commands/CreateChannelCommand.ts
@@ -59,6 +59,7 @@ export interface CreateChannelCommandOutput extends CreateChannelResponse, __Met
  * //       Url: "STRING_VALUE",
  * //     },
  * //   ],
+ * //   ETag: "STRING_VALUE",
  * //   Tags: { // TagMap
  * //     "<keys>": "STRING_VALUE",
  * //   },
diff --git a/clients/client-mediapackagev2/src/commands/CreateChannelGroupCommand.ts b/clients/client-mediapackagev2/src/commands/CreateChannelGroupCommand.ts
index 3e04ff26d2f8..51e56e00d8b7 100644
--- a/clients/client-mediapackagev2/src/commands/CreateChannelGroupCommand.ts
+++ b/clients/client-mediapackagev2/src/commands/CreateChannelGroupCommand.ts
@@ -51,6 +51,7 @@ export interface CreateChannelGroupCommandOutput extends CreateChannelGroupRespo
  * //   EgressDomain: "STRING_VALUE", // required
  * //   CreatedAt: new Date("TIMESTAMP"), // required
  * //   ModifiedAt: new Date("TIMESTAMP"), // required
+ * //   ETag: "STRING_VALUE",
  * //   Description: "STRING_VALUE",
  * //   Tags: { // TagMap
  * //     "<keys>": "STRING_VALUE",
diff --git a/clients/client-mediapackagev2/src/commands/CreateOriginEndpointCommand.ts b/clients/client-mediapackagev2/src/commands/CreateOriginEndpointCommand.ts
index fbb4351c9827..be2068d12be9 100644
--- a/clients/client-mediapackagev2/src/commands/CreateOriginEndpointCommand.ts
+++ b/clients/client-mediapackagev2/src/commands/CreateOriginEndpointCommand.ts
@@ -193,6 +193,7 @@ export interface CreateOriginEndpointCommandOutput extends CreateOriginEndpointR
  * //       },
  * //     },
  * //   ],
+ * //   ETag: "STRING_VALUE",
  * //   Tags: { // TagMap
  * //     "<keys>": "STRING_VALUE",
  * //   },
diff --git a/clients/client-mediapackagev2/src/commands/GetChannelCommand.ts b/clients/client-mediapackagev2/src/commands/GetChannelCommand.ts
index b47a124686ba..f399ad1d2f36 100644
--- a/clients/client-mediapackagev2/src/commands/GetChannelCommand.ts
+++ b/clients/client-mediapackagev2/src/commands/GetChannelCommand.ts
@@ -54,6 +54,7 @@ export interface GetChannelCommandOutput extends GetChannelResponse, __MetadataB
  * //       Url: "STRING_VALUE",
  * //     },
  * //   ],
+ * //   ETag: "STRING_VALUE",
  * //   Tags: { // TagMap
  * //     "<keys>": "STRING_VALUE",
  * //   },
diff --git a/clients/client-mediapackagev2/src/commands/GetChannelGroupCommand.ts b/clients/client-mediapackagev2/src/commands/GetChannelGroupCommand.ts
index 747bbe481912..2e6e6d99fa53 100644
--- a/clients/client-mediapackagev2/src/commands/GetChannelGroupCommand.ts
+++ b/clients/client-mediapackagev2/src/commands/GetChannelGroupCommand.ts
@@ -47,6 +47,7 @@ export interface GetChannelGroupCommandOutput extends GetChannelGroupResponse, _
  * //   CreatedAt: new Date("TIMESTAMP"), // required
  * //   ModifiedAt: new Date("TIMESTAMP"), // required
  * //   Description: "STRING_VALUE",
+ * //   ETag: "STRING_VALUE",
  * //   Tags: { // TagMap
  * //     "<keys>": "STRING_VALUE",
  * //   },
diff --git a/clients/client-mediapackagev2/src/commands/GetOriginEndpointCommand.ts b/clients/client-mediapackagev2/src/commands/GetOriginEndpointCommand.ts
index d1af1600af4b..c0d0d76de4a3 100644
--- a/clients/client-mediapackagev2/src/commands/GetOriginEndpointCommand.ts
+++ b/clients/client-mediapackagev2/src/commands/GetOriginEndpointCommand.ts
@@ -120,6 +120,7 @@ export interface GetOriginEndpointCommandOutput extends GetOriginEndpointRespons
  * //       },
  * //     },
  * //   ],
+ * //   ETag: "STRING_VALUE",
  * //   Tags: { // TagMap
  * //     "<keys>": "STRING_VALUE",
  * //   },
diff --git a/clients/client-mediapackagev2/src/commands/UpdateChannelCommand.ts b/clients/client-mediapackagev2/src/commands/UpdateChannelCommand.ts
index d7859095a79a..488b97b29367 100644
--- a/clients/client-mediapackagev2/src/commands/UpdateChannelCommand.ts
+++ b/clients/client-mediapackagev2/src/commands/UpdateChannelCommand.ts
@@ -39,6 +39,7 @@ export interface UpdateChannelCommandOutput extends UpdateChannelResponse, __Met
  * const input = { // UpdateChannelRequest
  *   ChannelGroupName: "STRING_VALUE", // required
  *   ChannelName: "STRING_VALUE", // required
+ *   ETag: "STRING_VALUE",
  *   Description: "STRING_VALUE",
  * };
  * const command = new UpdateChannelCommand(input);
@@ -56,6 +57,7 @@ export interface UpdateChannelCommandOutput extends UpdateChannelResponse, __Met
  * //       Url: "STRING_VALUE",
  * //     },
  * //   ],
+ * //   ETag: "STRING_VALUE",
  * //   Tags: { // TagMap
  * //     "<keys>": "STRING_VALUE",
  * //   },
diff --git a/clients/client-mediapackagev2/src/commands/UpdateChannelGroupCommand.ts b/clients/client-mediapackagev2/src/commands/UpdateChannelGroupCommand.ts
index 0bdd59d8b937..a0b4e8707a5d 100644
--- a/clients/client-mediapackagev2/src/commands/UpdateChannelGroupCommand.ts
+++ b/clients/client-mediapackagev2/src/commands/UpdateChannelGroupCommand.ts
@@ -38,6 +38,7 @@ export interface UpdateChannelGroupCommandOutput extends UpdateChannelGroupRespo
  * const client = new MediaPackageV2Client(config);
  * const input = { // UpdateChannelGroupRequest
  *   ChannelGroupName: "STRING_VALUE", // required
+ *   ETag: "STRING_VALUE",
  *   Description: "STRING_VALUE",
  * };
  * const command = new UpdateChannelGroupCommand(input);
@@ -49,6 +50,7 @@ export interface UpdateChannelGroupCommandOutput extends UpdateChannelGroupRespo
  * //   CreatedAt: new Date("TIMESTAMP"), // required
  * //   ModifiedAt: new Date("TIMESTAMP"), // required
  * //   Description: "STRING_VALUE",
+ * //   ETag: "STRING_VALUE",
  * //   Tags: { // TagMap
  * //     "<keys>": "STRING_VALUE",
  * //   },
diff --git a/clients/client-mediapackagev2/src/commands/UpdateOriginEndpointCommand.ts b/clients/client-mediapackagev2/src/commands/UpdateOriginEndpointCommand.ts
index 16707ce0dd33..7acf2f249d49 100644
--- a/clients/client-mediapackagev2/src/commands/UpdateOriginEndpointCommand.ts
+++ b/clients/client-mediapackagev2/src/commands/UpdateOriginEndpointCommand.ts
@@ -109,6 +109,7 @@ export interface UpdateOriginEndpointCommandOutput extends UpdateOriginEndpointR
  *       },
  *     },
  *   ],
+ *   ETag: "STRING_VALUE",
  * };
  * const command = new UpdateOriginEndpointCommand(input);
  * const response = await client.send(command);
@@ -190,6 +191,7 @@ export interface UpdateOriginEndpointCommandOutput extends UpdateOriginEndpointR
  * //       },
  * //     },
  * //   ],
+ * //   ETag: "STRING_VALUE",
  * //   Tags: { // TagMap
  * //     "<keys>": "STRING_VALUE",
  * //   },
diff --git a/clients/client-mediapackagev2/src/models/models_0.ts b/clients/client-mediapackagev2/src/models/models_0.ts
index 49e9abc96a85..e77864459f9f 100644
--- a/clients/client-mediapackagev2/src/models/models_0.ts
+++ b/clients/client-mediapackagev2/src/models/models_0.ts
@@ -477,6 +477,12 @@ export interface CreateChannelResponse {
    */
   IngestEndpoints?: IngestEndpoint[];
 
+  /**
+   * @public
+   * <p>The current Entity Tag (ETag) associated with this resource. The entity tag can be used to safely make concurrent updates to the resource.</p>
+   */
+  ETag?: string;
+
   /**
    * @public
    * <p>The comma-separated list of tag key:value pairs assigned to the channel.</p>
@@ -591,6 +597,12 @@ export interface GetChannelResponse {
    */
   IngestEndpoints?: IngestEndpoint[];
 
+  /**
+   * @public
+   * <p>The current Entity Tag (ETag) associated with this resource. The entity tag can be used to safely make concurrent updates to the resource.</p>
+   */
+  ETag?: string;
+
   /**
    * @public
    * <p>The comma-separated list of tag key:value pairs assigned to the channel.</p>
@@ -1441,6 +1453,12 @@ export interface CreateOriginEndpointResponse {
    */
   LowLatencyHlsManifests?: GetLowLatencyHlsManifestConfiguration[];
 
+  /**
+   * @public
+   * <p>The current Entity Tag (ETag) associated with this resource. The entity tag can be used to safely make concurrent updates to the resource.</p>
+   */
+  ETag?: string;
+
   /**
    * @public
    * <p>The comma-separated list of tag key:value pairs assigned to the origin endpoint.</p>
@@ -1575,6 +1593,12 @@ export interface GetOriginEndpointResponse {
    */
   LowLatencyHlsManifests?: GetLowLatencyHlsManifestConfiguration[];
 
+  /**
+   * @public
+   * <p>The current Entity Tag (ETag) associated with this resource. The entity tag can be used to safely make concurrent updates to the resource.</p>
+   */
+  ETag?: string;
+
   /**
    * @public
    * <p>The comma-separated list of tag key:value pairs assigned to the origin endpoint.</p>
@@ -1913,6 +1937,12 @@ export interface UpdateOriginEndpointRequest {
    * <p>A low-latency HLS manifest configuration.</p>
    */
   LowLatencyHlsManifests?: CreateLowLatencyHlsManifestConfiguration[];
+
+  /**
+   * @public
+   * <p>The expected current Entity Tag (ETag) for the resource. If the specified ETag does not match the resource's current entity tag, the update request will be rejected.</p>
+   */
+  ETag?: string;
 }
 
 /**
@@ -1991,6 +2021,12 @@ export interface UpdateOriginEndpointResponse {
    */
   LowLatencyHlsManifests?: GetLowLatencyHlsManifestConfiguration[];
 
+  /**
+   * @public
+   * <p>The current Entity Tag (ETag) associated with this resource. The entity tag can be used to safely make concurrent updates to the resource.</p>
+   */
+  ETag?: string;
+
   /**
    * @public
    * <p>The comma-separated list of tag key:value pairs assigned to the origin endpoint.</p>
@@ -2014,6 +2050,12 @@ export interface UpdateChannelRequest {
    */
   ChannelName: string | undefined;
 
+  /**
+   * @public
+   * <p>The expected current Entity Tag (ETag) for the resource. If the specified ETag does not match the resource's current entity tag, the update request will be rejected.</p>
+   */
+  ETag?: string;
+
   /**
    * @public
    * <p>Any descriptive information that you want to add to the channel for future identification purposes.</p>
@@ -2067,6 +2109,12 @@ export interface UpdateChannelResponse {
    */
   IngestEndpoints?: IngestEndpoint[];
 
+  /**
+   * @public
+   * <p>The current Entity Tag (ETag) associated with this resource. The entity tag can be used to safely make concurrent updates to the resource.</p>
+   */
+  ETag?: string;
+
   /**
    * @public
    * <p>The comma-separated list of tag key:value pairs assigned to the channel.</p>
@@ -2143,6 +2191,12 @@ export interface CreateChannelGroupResponse {
    */
   ModifiedAt: Date | undefined;
 
+  /**
+   * @public
+   * <p>The current Entity Tag (ETag) associated with this resource. The entity tag can be used to safely make concurrent updates to the resource.</p>
+   */
+  ETag?: string;
+
   /**
    * @public
    * <p>The description for your channel group.</p>
@@ -2223,6 +2277,12 @@ export interface GetChannelGroupResponse {
    */
   Description?: string;
 
+  /**
+   * @public
+   * <p>The current Entity Tag (ETag) associated with this resource. The entity tag can be used to safely make concurrent updates to the resource.</p>
+   */
+  ETag?: string;
+
   /**
    * @public
    * <p>The comma-separated list of tag key:value pairs assigned to the channel group.</p>
@@ -2274,6 +2334,12 @@ export interface UpdateChannelGroupRequest {
    */
   ChannelGroupName: string | undefined;
 
+  /**
+   * @public
+   * <p>The expected current Entity Tag (ETag) for the resource. If the specified ETag does not match the resource's current entity tag, the update request will be rejected.</p>
+   */
+  ETag?: string;
+
   /**
    * @public
    * <p>Any descriptive information that you want to add to the channel group for future identification purposes.</p>
@@ -2321,6 +2387,12 @@ export interface UpdateChannelGroupResponse {
    */
   Description?: string;
 
+  /**
+   * @public
+   * <p>The current Entity Tag (ETag) associated with this resource. The entity tag can be used to safely make concurrent updates to the resource.</p>
+   */
+  ETag?: string;
+
   /**
    * @public
    * <p>The comma-separated list of tag key:value pairs assigned to the channel group.</p>
diff --git a/clients/client-mediapackagev2/src/protocols/Aws_restJson1.ts b/clients/client-mediapackagev2/src/protocols/Aws_restJson1.ts
index 4115b267a45e..3b0175503a72 100644
--- a/clients/client-mediapackagev2/src/protocols/Aws_restJson1.ts
+++ b/clients/client-mediapackagev2/src/protocols/Aws_restJson1.ts
@@ -537,9 +537,10 @@ export const se_UpdateChannelCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
+  const headers: any = map({}, isSerializableHeaderValue, {
     "content-type": "application/json",
-  };
+    [_xauim]: input[_ET]!,
+  });
   b.bp("/channelGroup/{ChannelGroupName}/channel/{ChannelName}");
   b.p("ChannelGroupName", () => input.ChannelGroupName!, "{ChannelGroupName}", false);
   b.p("ChannelName", () => input.ChannelName!, "{ChannelName}", false);
@@ -561,9 +562,10 @@ export const se_UpdateChannelGroupCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
+  const headers: any = map({}, isSerializableHeaderValue, {
     "content-type": "application/json",
-  };
+    [_xauim]: input[_ET]!,
+  });
   b.bp("/channelGroup/{ChannelGroupName}");
   b.p("ChannelGroupName", () => input.ChannelGroupName!, "{ChannelGroupName}", false);
   let body: any;
@@ -584,9 +586,10 @@ export const se_UpdateOriginEndpointCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
+  const headers: any = map({}, isSerializableHeaderValue, {
     "content-type": "application/json",
-  };
+    [_xauim]: input[_ET]!,
+  });
   b.bp("/channelGroup/{ChannelGroupName}/channel/{ChannelName}/originEndpoint/{OriginEndpointName}");
   b.p("ChannelGroupName", () => input.ChannelGroupName!, "{ChannelGroupName}", false);
   b.p("ChannelName", () => input.ChannelName!, "{ChannelName}", false);
@@ -626,6 +629,7 @@ export const de_CreateChannelCommand = async (
     ChannelName: __expectString,
     CreatedAt: (_) => __expectNonNull(__parseEpochTimestamp(__expectNumber(_))),
     Description: __expectString,
+    ETag: __expectString,
     IngestEndpoints: _json,
     ModifiedAt: (_) => __expectNonNull(__parseEpochTimestamp(__expectNumber(_))),
     Tags: _json,
@@ -653,6 +657,7 @@ export const de_CreateChannelGroupCommand = async (
     ChannelGroupName: __expectString,
     CreatedAt: (_) => __expectNonNull(__parseEpochTimestamp(__expectNumber(_))),
     Description: __expectString,
+    ETag: __expectString,
     EgressDomain: __expectString,
     ModifiedAt: (_) => __expectNonNull(__parseEpochTimestamp(__expectNumber(_))),
     Tags: _json,
@@ -682,6 +687,7 @@ export const de_CreateOriginEndpointCommand = async (
     ContainerType: __expectString,
     CreatedAt: (_) => __expectNonNull(__parseEpochTimestamp(__expectNumber(_))),
     Description: __expectString,
+    ETag: __expectString,
     HlsManifests: (_) => de_GetHlsManifests(_, context),
     LowLatencyHlsManifests: (_) => de_GetLowLatencyHlsManifests(_, context),
     ModifiedAt: (_) => __expectNonNull(__parseEpochTimestamp(__expectNumber(_))),
@@ -799,6 +805,7 @@ export const de_GetChannelCommand = async (
     ChannelName: __expectString,
     CreatedAt: (_) => __expectNonNull(__parseEpochTimestamp(__expectNumber(_))),
     Description: __expectString,
+    ETag: __expectString,
     IngestEndpoints: _json,
     ModifiedAt: (_) => __expectNonNull(__parseEpochTimestamp(__expectNumber(_))),
     Tags: _json,
@@ -826,6 +833,7 @@ export const de_GetChannelGroupCommand = async (
     ChannelGroupName: __expectString,
     CreatedAt: (_) => __expectNonNull(__parseEpochTimestamp(__expectNumber(_))),
     Description: __expectString,
+    ETag: __expectString,
     EgressDomain: __expectString,
     ModifiedAt: (_) => __expectNonNull(__parseEpochTimestamp(__expectNumber(_))),
     Tags: [, _json, `tags`],
@@ -878,6 +886,7 @@ export const de_GetOriginEndpointCommand = async (
     ContainerType: __expectString,
     CreatedAt: (_) => __expectNonNull(__parseEpochTimestamp(__expectNumber(_))),
     Description: __expectString,
+    ETag: __expectString,
     HlsManifests: (_) => de_GetHlsManifests(_, context),
     LowLatencyHlsManifests: (_) => de_GetLowLatencyHlsManifests(_, context),
     ModifiedAt: (_) => __expectNonNull(__parseEpochTimestamp(__expectNumber(_))),
@@ -1089,6 +1098,7 @@ export const de_UpdateChannelCommand = async (
     ChannelName: __expectString,
     CreatedAt: (_) => __expectNonNull(__parseEpochTimestamp(__expectNumber(_))),
     Description: __expectString,
+    ETag: __expectString,
     IngestEndpoints: _json,
     ModifiedAt: (_) => __expectNonNull(__parseEpochTimestamp(__expectNumber(_))),
     Tags: [, _json, `tags`],
@@ -1116,6 +1126,7 @@ export const de_UpdateChannelGroupCommand = async (
     ChannelGroupName: __expectString,
     CreatedAt: (_) => __expectNonNull(__parseEpochTimestamp(__expectNumber(_))),
     Description: __expectString,
+    ETag: __expectString,
     EgressDomain: __expectString,
     ModifiedAt: (_) => __expectNonNull(__parseEpochTimestamp(__expectNumber(_))),
     Tags: [, _json, `tags`],
@@ -1145,6 +1156,7 @@ export const de_UpdateOriginEndpointCommand = async (
     ContainerType: __expectString,
     CreatedAt: (_) => __expectNonNull(__parseEpochTimestamp(__expectNumber(_))),
     Description: __expectString,
+    ETag: __expectString,
     HlsManifests: (_) => de_GetHlsManifests(_, context),
     LowLatencyHlsManifests: (_) => de_GetLowLatencyHlsManifests(_, context),
     ModifiedAt: (_) => __expectNonNull(__parseEpochTimestamp(__expectNumber(_))),
@@ -1626,6 +1638,7 @@ const isSerializableHeaderValue = (value: any): boolean =>
   (!Object.getOwnPropertyNames(value).includes("size") || value.size != 0);
 
 const _CT = "ClientToken";
+const _ET = "ETag";
 const _MR = "MaxResults";
 const _NT = "NextToken";
 const _TK = "TagKeys";
@@ -1633,3 +1646,4 @@ const _mR = "maxResults";
 const _nT = "nextToken";
 const _tK = "tagKeys";
 const _xact = "x-amzn-client-token";
+const _xauim = "x-amzn-update-if-match";
diff --git a/codegen/sdk-codegen/aws-models/mediapackagev2.json b/codegen/sdk-codegen/aws-models/mediapackagev2.json
index 6160a303d0ea..5c9829cddd8a 100644
--- a/codegen/sdk-codegen/aws-models/mediapackagev2.json
+++ b/codegen/sdk-codegen/aws-models/mediapackagev2.json
@@ -387,6 +387,7 @@
                   "Url": "https://abcde-2.ingest.vwxyz.mediapackagev2.us-west-2.amazonaws.com/v1/exampleChannelGroup/exampleChannel/index"
                 }
               ],
+              "ETag": "GlfT+dwAyGIR4wuy8nKWl1RDPwSrjQej9qUutLZxoxk=",
               "Tags": {
                 "key1": "value1",
                 "key2": "value2"
@@ -454,6 +455,7 @@
               "EgressDomain": "abcde.egress.vwxyz.mediapackagev2.us-west-2.amazonaws.com",
               "CreatedAt": "2022-10-18T09:36:00.00Z",
               "ModifiedAt": "2022-10-18T09:36:00.00Z",
+              "ETag": "GlfT+dwAyGIR4wuy8nKWl1RDPwSrjQej9qUutLZxoxk=",
               "Tags": {
                 "key1": "value1",
                 "key2": "value2"
@@ -543,6 +545,13 @@
             "smithy.api#required": {}
           }
         },
+        "ETag": {
+          "target": "com.amazonaws.mediapackagev2#EntityTag",
+          "traits": {
+            "aws.cloudformation#cfnExcludeProperty": {},
+            "smithy.api#documentation": "<p>The current Entity Tag (ETag) associated with this resource. The entity tag can be used to safely make concurrent updates to the resource.</p>"
+          }
+        },
         "Description": {
           "target": "com.amazonaws.mediapackagev2#ResourceDescription",
           "traits": {
@@ -653,6 +662,13 @@
         "IngestEndpoints": {
           "target": "com.amazonaws.mediapackagev2#IngestEndpointList"
         },
+        "ETag": {
+          "target": "com.amazonaws.mediapackagev2#EntityTag",
+          "traits": {
+            "aws.cloudformation#cfnExcludeProperty": {},
+            "smithy.api#documentation": "<p>The current Entity Tag (ETag) associated with this resource. The entity tag can be used to safely make concurrent updates to the resource.</p>"
+          }
+        },
         "Tags": {
           "target": "com.amazonaws.mediapackagev2#TagMap",
           "traits": {
@@ -689,8 +705,7 @@
           "traits": {
             "smithy.api#documentation": "<p>The total duration (in seconds) of the manifest's content.</p>",
             "smithy.api#range": {
-              "min": 30,
-              "max": 900
+              "min": 30
             }
           }
         },
@@ -742,8 +757,7 @@
           "traits": {
             "smithy.api#documentation": "<p>The total duration (in seconds) of the manifest's content.</p>",
             "smithy.api#range": {
-              "min": 30,
-              "max": 900
+              "min": 30
             }
           }
         },
@@ -969,6 +983,7 @@
                   "Url": "https://abcde.egress.vwxyz.mediapackagev2.us-west-2.amazonaws.com/out/v1/exampleChannelGroup/exampleChannel/exampleOriginEndpointTS/exampleLLManifest2.m3u8"
                 }
               ],
+              "ETag": "GlfT+dwAyGIR4wuy8nKWl1RDPwSrjQej9qUutLZxoxk=",
               "Tags": {
                 "key1": "value1",
                 "key2": "value2"
@@ -1131,6 +1146,7 @@
                   "Url": "https://abcde.egress.vwxyz.mediapackagev2.us-west-2.amazonaws.com/out/v1/exampleChannelGroup/exampleChannel/exampleOriginEndpointCMAF/exampleLLManifest2.m3u8"
                 }
               ],
+              "ETag": "GlfT+dwAyGIR4wuy8nKWl1RDPwSrjQej9qUutLZxoxk=",
               "Tags": {
                 "key1": "value1",
                 "key2": "value2"
@@ -1317,6 +1333,13 @@
             "smithy.api#documentation": "<p>A low-latency HLS manifest configuration.</p>"
           }
         },
+        "ETag": {
+          "target": "com.amazonaws.mediapackagev2#EntityTag",
+          "traits": {
+            "aws.cloudformation#cfnExcludeProperty": {},
+            "smithy.api#documentation": "<p>The current Entity Tag (ETag) associated with this resource. The entity tag can be used to safely make concurrent updates to the resource.</p>"
+          }
+        },
         "Tags": {
           "target": "com.amazonaws.mediapackagev2#TagMap",
           "traits": {
@@ -1840,6 +1863,16 @@
         "smithy.api#documentation": "<p>The encryption type.</p>"
       }
     },
+    "com.amazonaws.mediapackagev2#EntityTag": {
+      "type": "string",
+      "traits": {
+        "smithy.api#length": {
+          "min": 1,
+          "max": 256
+        },
+        "smithy.api#pattern": "^[\\S]+$"
+      }
+    },
     "com.amazonaws.mediapackagev2#FilterConfiguration": {
       "type": "structure",
       "members": {
@@ -1932,6 +1965,7 @@
                   "Url": "https://abcde-2.ingest.vwxyz.mediapackagev2.us-west-2.amazonaws.com/v1/exampleChannelGroup/exampleChannel/index"
                 }
               ],
+              "ETag": "GlfT+dwAyGIR4wuy8nKWl1RDPwSrjQej9qUutLZxoxk=",
               "Tags": {
                 "key1": "value1",
                 "key2": "value2"
@@ -1987,6 +2021,7 @@
               "EgressDomain": "abcde.egress.vwxyz.mediapackagev2.us-west-2.amazonaws.com",
               "CreatedAt": "2022-10-18T09:36:00.00Z",
               "ModifiedAt": "2022-10-18T09:36:00.00Z",
+              "ETag": "GlfT+dwAyGIR4wuy8nKWl1RDPwSrjQej9qUutLZxoxk=",
               "Tags": {
                 "key1": "value1",
                 "key2": "value2"
@@ -2061,6 +2096,13 @@
             "smithy.api#documentation": "<p>The description for your channel group.</p>"
           }
         },
+        "ETag": {
+          "target": "com.amazonaws.mediapackagev2#EntityTag",
+          "traits": {
+            "aws.cloudformation#cfnExcludeProperty": {},
+            "smithy.api#documentation": "<p>The current Entity Tag (ETag) associated with this resource. The entity tag can be used to safely make concurrent updates to the resource.</p>"
+          }
+        },
         "Tags": {
           "target": "com.amazonaws.mediapackagev2#TagMap",
           "traits": {
@@ -2247,6 +2289,13 @@
         "IngestEndpoints": {
           "target": "com.amazonaws.mediapackagev2#IngestEndpointList"
         },
+        "ETag": {
+          "target": "com.amazonaws.mediapackagev2#EntityTag",
+          "traits": {
+            "aws.cloudformation#cfnExcludeProperty": {},
+            "smithy.api#documentation": "<p>The current Entity Tag (ETag) associated with this resource. The entity tag can be used to safely make concurrent updates to the resource.</p>"
+          }
+        },
         "Tags": {
           "target": "com.amazonaws.mediapackagev2#TagMap",
           "traits": {
@@ -2480,6 +2529,7 @@
                   "Url": "https://abcde.egress.vwxyz.mediapackagev2.us-west-2.amazonaws.com/out/v1/exampleChannelGroup/exampleChannel/exampleOriginEndpointTS/exampleLLManifest2.m3u8"
                 }
               ],
+              "ETag": "GlfT+dwAyGIR4wuy8nKWl1RDPwSrjQej9qUutLZxoxk=",
               "Tags": {
                 "key1": "value1",
                 "key2": "value2"
@@ -2727,6 +2777,13 @@
             "smithy.api#documentation": "<p>A low-latency HLS manifest configuration.</p>"
           }
         },
+        "ETag": {
+          "target": "com.amazonaws.mediapackagev2#EntityTag",
+          "traits": {
+            "aws.cloudformation#cfnExcludeProperty": {},
+            "smithy.api#documentation": "<p>The current Entity Tag (ETag) associated with this resource. The entity tag can be used to safely make concurrent updates to the resource.</p>"
+          }
+        },
         "Tags": {
           "target": "com.amazonaws.mediapackagev2#TagMap",
           "traits": {
@@ -4317,6 +4374,7 @@
                   "Url": "https://abcde-2.ingest.vwxyz.mediapackagev2.us-west-2.amazonaws.com/v1/exampleChannelGroup/exampleChannel/index"
                 }
               ],
+              "ETag": "GlfT+dwAyGIR4wuy8nKWl1RDPwSrjQej9qUutLZxoxk=",
               "Tags": {
                 "key1": "value1",
                 "key2": "value2"
@@ -4377,6 +4435,7 @@
               "EgressDomain": "abcde.egress.vwxyz.mediapackagev2.us-west-2.amazonaws.com",
               "CreatedAt": "2022-10-18T09:36:00.00Z",
               "ModifiedAt": "2022-10-18T10:36:00.00Z",
+              "ETag": "GlfT+dwAyGIR4wuy8nKWl1RDPwSrjQej9qUutLZxoxk=",
               "Tags": {
                 "key1": "value1",
                 "key2": "value2"
@@ -4403,6 +4462,14 @@
             "smithy.api#required": {}
           }
         },
+        "ETag": {
+          "target": "com.amazonaws.mediapackagev2#EntityTag",
+          "traits": {
+            "aws.cloudformation#cfnExcludeProperty": {},
+            "smithy.api#documentation": "<p>The expected current Entity Tag (ETag) for the resource. If the specified ETag does not match the resource's current entity tag, the update request will be rejected.</p>",
+            "smithy.api#httpHeader": "x-amzn-update-if-match"
+          }
+        },
         "Description": {
           "target": "com.amazonaws.mediapackagev2#ResourceDescription",
           "traits": {
@@ -4458,6 +4525,13 @@
             "smithy.api#documentation": "<p>The description for your channel group.</p>"
           }
         },
+        "ETag": {
+          "target": "com.amazonaws.mediapackagev2#EntityTag",
+          "traits": {
+            "aws.cloudformation#cfnExcludeProperty": {},
+            "smithy.api#documentation": "<p>The current Entity Tag (ETag) associated with this resource. The entity tag can be used to safely make concurrent updates to the resource.</p>"
+          }
+        },
         "Tags": {
           "target": "com.amazonaws.mediapackagev2#TagMap",
           "traits": {
@@ -4490,6 +4564,14 @@
             "smithy.api#required": {}
           }
         },
+        "ETag": {
+          "target": "com.amazonaws.mediapackagev2#EntityTag",
+          "traits": {
+            "aws.cloudformation#cfnExcludeProperty": {},
+            "smithy.api#documentation": "<p>The expected current Entity Tag (ETag) for the resource. If the specified ETag does not match the resource's current entity tag, the update request will be rejected.</p>",
+            "smithy.api#httpHeader": "x-amzn-update-if-match"
+          }
+        },
         "Description": {
           "target": "com.amazonaws.mediapackagev2#ResourceDescription",
           "traits": {
@@ -4548,6 +4630,13 @@
         "IngestEndpoints": {
           "target": "com.amazonaws.mediapackagev2#IngestEndpointList"
         },
+        "ETag": {
+          "target": "com.amazonaws.mediapackagev2#EntityTag",
+          "traits": {
+            "aws.cloudformation#cfnExcludeProperty": {},
+            "smithy.api#documentation": "<p>The current Entity Tag (ETag) associated with this resource. The entity tag can be used to safely make concurrent updates to the resource.</p>"
+          }
+        },
         "Tags": {
           "target": "com.amazonaws.mediapackagev2#TagMap",
           "traits": {
@@ -4754,6 +4843,7 @@
                   "Url": "https://abcde.egress.vwxyz.mediapackagev2.us-west-2.amazonaws.com/out/v1/exampleChannelGroup/exampleChannel/exampleOriginEndpointTS/exampleLLManifest2.m3u8"
                 }
               ],
+              "ETag": "GlfT+dwAyGIR4wuy8nKWl1RDPwSrjQej9qUutLZxoxk=",
               "Tags": {
                 "key1": "value1",
                 "key2": "value2"
@@ -4838,6 +4928,14 @@
             "aws.cloudformation#cfnExcludeProperty": {},
             "smithy.api#documentation": "<p>A low-latency HLS manifest configuration.</p>"
           }
+        },
+        "ETag": {
+          "target": "com.amazonaws.mediapackagev2#EntityTag",
+          "traits": {
+            "aws.cloudformation#cfnExcludeProperty": {},
+            "smithy.api#documentation": "<p>The expected current Entity Tag (ETag) for the resource. If the specified ETag does not match the resource's current entity tag, the update request will be rejected.</p>",
+            "smithy.api#httpHeader": "x-amzn-update-if-match"
+          }
         }
       },
       "traits": {
@@ -4927,6 +5025,13 @@
             "smithy.api#documentation": "<p>A low-latency HLS manifest configuration.</p>"
           }
         },
+        "ETag": {
+          "target": "com.amazonaws.mediapackagev2#EntityTag",
+          "traits": {
+            "aws.cloudformation#cfnExcludeProperty": {},
+            "smithy.api#documentation": "<p>The current Entity Tag (ETag) associated with this resource. The entity tag can be used to safely make concurrent updates to the resource.</p>"
+          }
+        },
         "Tags": {
           "target": "com.amazonaws.mediapackagev2#TagMap",
           "traits": {