diff --git a/specification/storage/Microsoft.BlobStorage/models.tsp b/specification/storage/Microsoft.BlobStorage/models.tsp
index bfe2ae056ead..bd4fa92879b9 100644
--- a/specification/storage/Microsoft.BlobStorage/models.tsp
+++ b/specification/storage/Microsoft.BlobStorage/models.tsp
@@ -2323,6 +2323,36 @@ alias PageWriteParameter<TPageWrite extends string> = {
   pageWrite: TPageWrite;
 };
 
+alias IfBlobMatchHeader = {
+  /** Specify an ETag value to operate only on blobs with a matching value. */
+  @added(Versions.v2026_02_06)
+  @header("x-ms-blob-if-match")
+  ifMatch?: string;
+};
+
+alias IfBlobModifiedSinceHeader = {
+  /** Specify this header value to operate only on a blob if it has been modified since the specified date/time. */
+  @added(Versions.v2026_02_06)
+  @header("x-ms-blob-if-modified-since")
+  @encode("rfc7231")
+  ifModifiedSince?: utcDateTime;
+};
+
+alias IfBlobNoneMatchHeader = {
+  /** Specify an ETag value to operate only on blobs without a matching value. */
+  @added(Versions.v2026_02_06)
+  @header("x-ms-blob-if-none-match")
+  ifNoneMatch?: string;
+};
+
+alias IfBlobUnmodifiedSinceHeader = {
+  /** Specify this header value to operate only on a blob if it has not been modified since the specified date/time. */
+  @added(Versions.v2026_02_06)
+  @header("x-ms-blob-if-unmodified-since")
+  @encode("rfc7231")
+  ifUnmodifiedSince?: utcDateTime;
+};
+
 alias ListBlobsStartFrom = {
   /** Specifies the relative path to list paths from. For non-recursive list, only one entity level is supported; For recursive list, multiple entity levels are supported. (Inclusive) */
   @added(Versions.v2026_02_06)
diff --git a/specification/storage/Microsoft.BlobStorage/routes.tsp b/specification/storage/Microsoft.BlobStorage/routes.tsp
index a785ebd77d46..da080db30133 100644
--- a/specification/storage/Microsoft.BlobStorage/routes.tsp
+++ b/specification/storage/Microsoft.BlobStorage/routes.tsp
@@ -1459,6 +1459,10 @@ namespace Storage.Blob {
           ...VersionIdParameter;
           ...LeaseIdOptionalParameter;
           ...IfTagsParameter;
+          ...IfBlobModifiedSinceHeader;
+          ...IfBlobUnmodifiedSinceHeader;
+          ...IfBlobMatchHeader;
+          ...IfBlobNoneMatchHeader;
         },
         {
           ...DateResponseHeader;
@@ -1487,6 +1491,11 @@ namespace Storage.Blob {
           /** The blob tags. */
           @body
           tags: BlobTags;
+
+          ...IfBlobModifiedSinceHeader;
+          ...IfBlobUnmodifiedSinceHeader;
+          ...IfBlobMatchHeader;
+          ...IfBlobNoneMatchHeader;
         },
         {
           @statusCode statusCode: 204;
diff --git a/specification/storage/data-plane/Microsoft.BlobStorage/stable/2026-02-06/generated_blob.json b/specification/storage/data-plane/Microsoft.BlobStorage/stable/2026-02-06/generated_blob.json
index ae6748da3501..5c3f6d1df44e 100644
--- a/specification/storage/data-plane/Microsoft.BlobStorage/stable/2026-02-06/generated_blob.json
+++ b/specification/storage/data-plane/Microsoft.BlobStorage/stable/2026-02-06/generated_blob.json
@@ -8441,6 +8441,40 @@
             "type": "string",
             "x-ms-client-name": "ifTags"
           },
+          {
+            "name": "x-ms-blob-if-modified-since",
+            "in": "header",
+            "description": "Specify this header value to operate only on a blob if it has been modified since the specified date/time.",
+            "required": false,
+            "type": "string",
+            "format": "date-time-rfc7231",
+            "x-ms-client-name": "ifModifiedSince"
+          },
+          {
+            "name": "x-ms-blob-if-unmodified-since",
+            "in": "header",
+            "description": "Specify this header value to operate only on a blob if it has not been modified since the specified date/time.",
+            "required": false,
+            "type": "string",
+            "format": "date-time-rfc7231",
+            "x-ms-client-name": "ifUnmodifiedSince"
+          },
+          {
+            "name": "x-ms-blob-if-match",
+            "in": "header",
+            "description": "Specify an ETag value to operate only on blobs with a matching value.",
+            "required": false,
+            "type": "string",
+            "x-ms-client-name": "ifMatch"
+          },
+          {
+            "name": "x-ms-blob-if-none-match",
+            "in": "header",
+            "description": "Specify an ETag value to operate only on blobs without a matching value.",
+            "required": false,
+            "type": "string",
+            "x-ms-client-name": "ifNoneMatch"
+          },
           {
             "name": "x-ms-client-request-id",
             "in": "header",
@@ -8590,6 +8624,40 @@
             "type": "string",
             "x-ms-client-name": "leaseId"
           },
+          {
+            "name": "x-ms-blob-if-modified-since",
+            "in": "header",
+            "description": "Specify this header value to operate only on a blob if it has been modified since the specified date/time.",
+            "required": false,
+            "type": "string",
+            "format": "date-time-rfc7231",
+            "x-ms-client-name": "ifModifiedSince"
+          },
+          {
+            "name": "x-ms-blob-if-unmodified-since",
+            "in": "header",
+            "description": "Specify this header value to operate only on a blob if it has not been modified since the specified date/time.",
+            "required": false,
+            "type": "string",
+            "format": "date-time-rfc7231",
+            "x-ms-client-name": "ifUnmodifiedSince"
+          },
+          {
+            "name": "x-ms-blob-if-match",
+            "in": "header",
+            "description": "Specify an ETag value to operate only on blobs with a matching value.",
+            "required": false,
+            "type": "string",
+            "x-ms-client-name": "ifMatch"
+          },
+          {
+            "name": "x-ms-blob-if-none-match",
+            "in": "header",
+            "description": "Specify an ETag value to operate only on blobs without a matching value.",
+            "required": false,
+            "type": "string",
+            "x-ms-client-name": "ifNoneMatch"
+          },
           {
             "name": "x-ms-client-request-id",
             "in": "header",