diff --git a/specification/storage/Microsoft.BlobStorage/client.tsp b/specification/storage/Microsoft.BlobStorage/client.tsp
index aa7e5932c3af..164d711c26cd 100644
--- a/specification/storage/Microsoft.BlobStorage/client.tsp
+++ b/specification/storage/Microsoft.BlobStorage/client.tsp
@@ -256,6 +256,12 @@ interface PageBlobClient extends Storage.Blob.PageBlob {}
   uint64,
   "rust"
 );
+// Range/source-range string parameters → HttpRange for Rust
+@@alternateType(Blob.download::parameters.range, HttpRange, "rust");
+@@alternateType(RangeParameter.range, HttpRange, "rust");
+@@alternateType(RangeParameterRequired.range, HttpRange, "rust");
+@@alternateType(SourceRangeParameter.sourceRange, HttpRange, "rust");
+@@alternateType(SourceRangeParameterRequired.sourceRange, HttpRange, "rust");
 
 @@scope(Storage.Blob.Container.submitBatch, "!rust");
 @@scope(Storage.Blob.Service.submitBatch, "!rust");
@@ -935,3 +941,12 @@ op setAccessPolicyRequiredContainerAcl is StorageOperationNoBody<
   setAccessPolicyRequiredContainerAcl,
   "rust"
 );
+
+/** An HTTP byte range, e.g. "bytes=0-1023". */
+@alternateType(
+  {
+    identity: "crate::models::HttpRange",
+  },
+  "rust"
+)
+scalar HttpRange extends string;
diff --git a/specification/storage/Microsoft.BlobStorage/models.tsp b/specification/storage/Microsoft.BlobStorage/models.tsp
index 32e9582480ba..9291492c1560 100644
--- a/specification/storage/Microsoft.BlobStorage/models.tsp
+++ b/specification/storage/Microsoft.BlobStorage/models.tsp
@@ -1790,6 +1790,13 @@ alias SourceRangeParameter = {
   sourceRange?: string;
 };
 
+/** The required source range parameter. */
+alias SourceRangeParameterRequired = {
+  /** Bytes of source data in the specified range. */
+  @header("x-ms-source-range")
+  sourceRange: string;
+};
+
 /** The source URL parameter. */
 alias SourceUrlParameter = {
   /** Specify a URL to the copy source. */
@@ -2486,6 +2493,13 @@ alias RangeParameter = {
   range?: string;
 };
 
+/** The required range parameter. */
+alias RangeParameterRequired = {
+  /** Bytes of data in the specified range. */
+  @header("Range")
+  range: string;
+};
+
 /** The version ID parameter. */
 alias VersionIdParameter = {
   /** The version id parameter is an opaque DateTime value that, when present, specifies the version of the blob to operate on. It's for service version 2019-10-10 and newer. */
diff --git a/specification/storage/Microsoft.BlobStorage/routes.tsp b/specification/storage/Microsoft.BlobStorage/routes.tsp
index e434a7649863..770bfac9ad22 100644
--- a/specification/storage/Microsoft.BlobStorage/routes.tsp
+++ b/specification/storage/Microsoft.BlobStorage/routes.tsp
@@ -701,7 +701,10 @@ interface Blob {
     ...EncryptionKeySha256Parameter,
     ...EncryptionAlgorithmParameter,
     ...IfTagsParameter,
-    ...ConditionalRequestHeaders,
+    ...IfModifiedSinceParameter,
+    ...IfUnmodifiedSinceParameter,
+    ...IfNoneMatchParameter,
+    ...IfMatchParameter,
   ): (BodyParameter & {
     /** The media type of the body of the response. */
     @header("Content-Type")
@@ -1544,11 +1547,7 @@ interface PageBlob {
       ...ContentMd5Parameter;
       ...ContentCrc64Parameter;
       ...TimeoutParameter;
-
-      /** Bytes of data in the specified range. */
-      @header("Range")
-      range: string;
-
+      ...RangeParameterRequired;
       ...LeaseIdOptionalParameter;
       ...EncryptionKeyParameter;
       ...EncryptionKeySha256Parameter;
@@ -1595,11 +1594,7 @@ interface PageBlob {
       contentLength: 0;
 
       ...TimeoutParameter;
-
-      /** Bytes of data in the specified range. */
-      @header("Range")
-      range: string;
-
+      ...RangeParameterRequired;
       ...LeaseIdOptionalParameter;
       ...EncryptionKeyParameter;
       ...EncryptionKeySha256Parameter;
@@ -1635,20 +1630,12 @@ interface PageBlob {
   uploadPagesFromUrl is StorageOperationNoBody<
     {
       ...SourceUrlParameter;
-
-      /** Bytes of source data in the specified range. The length of this range should match the ContentLength header and x-ms-range/Range destination range header. */
-      @header("x-ms-source-range")
-      sourceRange: string;
-
+      ...SourceRangeParameterRequired;
       ...SourceContentMd5Parameter;
       ...SourceContentCrc64Parameter;
       ...ContentLengthParameter;
       ...TimeoutParameter;
-
-      /** Bytes of source data in the specified range. The length of this range should match the ContentLength header and x-ms-range/Range destination range header. */
-      @header("Range")
-      range: string;
-
+      ...RangeParameterRequired;
       ...EncryptionKeyParameter;
       ...EncryptionKeySha256Parameter;
       ...EncryptionAlgorithmParameter;
diff --git a/specification/storage/data-plane/Microsoft.BlobStorage/stable/2025-11-05/generated_blob.json b/specification/storage/data-plane/Microsoft.BlobStorage/stable/2025-11-05/generated_blob.json
index de81177507f8..99404fc4ea74 100644
--- a/specification/storage/data-plane/Microsoft.BlobStorage/stable/2025-11-05/generated_blob.json
+++ b/specification/storage/data-plane/Microsoft.BlobStorage/stable/2025-11-05/generated_blob.json
@@ -189,16 +189,38 @@
             "x-ms-client-name": "ifTags"
           },
           {
-            "$ref": "#/parameters/Azure.Core.ConditionalRequestHeaders.ifMatch"
+            "name": "If-Modified-Since",
+            "in": "header",
+            "description": "A date-time value. A request is made under the condition that the resource has been modified since the specified date-time.",
+            "required": false,
+            "type": "string",
+            "format": "date-time-rfc7231",
+            "x-ms-client-name": "ifModifiedSince"
           },
           {
-            "$ref": "#/parameters/Azure.Core.ConditionalRequestHeaders.ifNoneMatch"
+            "name": "If-Unmodified-Since",
+            "in": "header",
+            "description": "A date-time value. A request is made under the condition that the resource has not been modified since the specified date-time.",
+            "required": false,
+            "type": "string",
+            "format": "date-time-rfc7231",
+            "x-ms-client-name": "ifUnmodifiedSince"
           },
           {
-            "$ref": "#/parameters/Azure.Core.ConditionalRequestHeaders.ifUnmodifiedSince"
+            "name": "If-None-Match",
+            "in": "header",
+            "description": "A condition that must be met in order for the request to be processed.",
+            "required": false,
+            "type": "string",
+            "x-ms-client-name": "ifNoneMatch"
           },
           {
-            "$ref": "#/parameters/Azure.Core.ConditionalRequestHeaders.ifModifiedSince"
+            "name": "If-Match",
+            "in": "header",
+            "description": "A condition that must be met in order for the request to be processed.",
+            "required": false,
+            "type": "string",
+            "x-ms-client-name": "ifMatch"
           }
         ],
         "responses": {
@@ -7465,7 +7487,7 @@
           {
             "name": "x-ms-source-range",
             "in": "header",
-            "description": "Bytes of source data in the specified range. The length of this range should match the ContentLength header and x-ms-range/Range destination range header.",
+            "description": "Bytes of source data in the specified range.",
             "required": true,
             "type": "string",
             "x-ms-client-name": "sourceRange"
@@ -7509,7 +7531,7 @@
           {
             "name": "Range",
             "in": "header",
-            "description": "Bytes of source data in the specified range. The length of this range should match the ContentLength header and x-ms-range/Range destination range header.",
+            "description": "Bytes of data in the specified range.",
             "required": true,
             "type": "string",
             "x-ms-client-name": "range"
@@ -17951,44 +17973,5 @@
       "format": "byte"
     }
   },
-  "parameters": {
-    "Azure.Core.ConditionalRequestHeaders.ifMatch": {
-      "name": "If-Match",
-      "in": "header",
-      "description": "The request should only proceed if an entity matches this string.",
-      "required": false,
-      "type": "string",
-      "x-ms-parameter-location": "method",
-      "x-ms-client-name": "ifMatch"
-    },
-    "Azure.Core.ConditionalRequestHeaders.ifModifiedSince": {
-      "name": "If-Modified-Since",
-      "in": "header",
-      "description": "The request should only proceed if the entity was modified after this time.",
-      "required": false,
-      "type": "string",
-      "format": "date-time",
-      "x-ms-parameter-location": "method",
-      "x-ms-client-name": "ifModifiedSince"
-    },
-    "Azure.Core.ConditionalRequestHeaders.ifNoneMatch": {
-      "name": "If-None-Match",
-      "in": "header",
-      "description": "The request should only proceed if no entity matches this string.",
-      "required": false,
-      "type": "string",
-      "x-ms-parameter-location": "method",
-      "x-ms-client-name": "ifNoneMatch"
-    },
-    "Azure.Core.ConditionalRequestHeaders.ifUnmodifiedSince": {
-      "name": "If-Unmodified-Since",
-      "in": "header",
-      "description": "The request should only proceed if the entity was not modified after this time.",
-      "required": false,
-      "type": "string",
-      "format": "date-time",
-      "x-ms-parameter-location": "method",
-      "x-ms-client-name": "ifUnmodifiedSince"
-    }
-  }
+  "parameters": {}
 }
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 c5e3f7d5ca7c..ddf381db7011 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
@@ -189,16 +189,38 @@
             "x-ms-client-name": "ifTags"
           },
           {
-            "$ref": "#/parameters/Azure.Core.ConditionalRequestHeaders.ifMatch"
+            "name": "If-Modified-Since",
+            "in": "header",
+            "description": "A date-time value. A request is made under the condition that the resource has been modified since the specified date-time.",
+            "required": false,
+            "type": "string",
+            "format": "date-time-rfc7231",
+            "x-ms-client-name": "ifModifiedSince"
           },
           {
-            "$ref": "#/parameters/Azure.Core.ConditionalRequestHeaders.ifNoneMatch"
+            "name": "If-Unmodified-Since",
+            "in": "header",
+            "description": "A date-time value. A request is made under the condition that the resource has not been modified since the specified date-time.",
+            "required": false,
+            "type": "string",
+            "format": "date-time-rfc7231",
+            "x-ms-client-name": "ifUnmodifiedSince"
           },
           {
-            "$ref": "#/parameters/Azure.Core.ConditionalRequestHeaders.ifUnmodifiedSince"
+            "name": "If-None-Match",
+            "in": "header",
+            "description": "A condition that must be met in order for the request to be processed.",
+            "required": false,
+            "type": "string",
+            "x-ms-client-name": "ifNoneMatch"
           },
           {
-            "$ref": "#/parameters/Azure.Core.ConditionalRequestHeaders.ifModifiedSince"
+            "name": "If-Match",
+            "in": "header",
+            "description": "A condition that must be met in order for the request to be processed.",
+            "required": false,
+            "type": "string",
+            "x-ms-client-name": "ifMatch"
           }
         ],
         "responses": {
@@ -7465,7 +7487,7 @@
           {
             "name": "x-ms-source-range",
             "in": "header",
-            "description": "Bytes of source data in the specified range. The length of this range should match the ContentLength header and x-ms-range/Range destination range header.",
+            "description": "Bytes of source data in the specified range.",
             "required": true,
             "type": "string",
             "x-ms-client-name": "sourceRange"
@@ -7509,7 +7531,7 @@
           {
             "name": "Range",
             "in": "header",
-            "description": "Bytes of source data in the specified range. The length of this range should match the ContentLength header and x-ms-range/Range destination range header.",
+            "description": "Bytes of data in the specified range.",
             "required": true,
             "type": "string",
             "x-ms-client-name": "range"
@@ -18033,44 +18055,5 @@
       "format": "byte"
     }
   },
-  "parameters": {
-    "Azure.Core.ConditionalRequestHeaders.ifMatch": {
-      "name": "If-Match",
-      "in": "header",
-      "description": "The request should only proceed if an entity matches this string.",
-      "required": false,
-      "type": "string",
-      "x-ms-parameter-location": "method",
-      "x-ms-client-name": "ifMatch"
-    },
-    "Azure.Core.ConditionalRequestHeaders.ifModifiedSince": {
-      "name": "If-Modified-Since",
-      "in": "header",
-      "description": "The request should only proceed if the entity was modified after this time.",
-      "required": false,
-      "type": "string",
-      "format": "date-time",
-      "x-ms-parameter-location": "method",
-      "x-ms-client-name": "ifModifiedSince"
-    },
-    "Azure.Core.ConditionalRequestHeaders.ifNoneMatch": {
-      "name": "If-None-Match",
-      "in": "header",
-      "description": "The request should only proceed if no entity matches this string.",
-      "required": false,
-      "type": "string",
-      "x-ms-parameter-location": "method",
-      "x-ms-client-name": "ifNoneMatch"
-    },
-    "Azure.Core.ConditionalRequestHeaders.ifUnmodifiedSince": {
-      "name": "If-Unmodified-Since",
-      "in": "header",
-      "description": "The request should only proceed if the entity was not modified after this time.",
-      "required": false,
-      "type": "string",
-      "format": "date-time",
-      "x-ms-parameter-location": "method",
-      "x-ms-client-name": "ifUnmodifiedSince"
-    }
-  }
+  "parameters": {}
 }
diff --git a/specification/storage/data-plane/Microsoft.BlobStorage/stable/2026-04-06/generated_blob.json b/specification/storage/data-plane/Microsoft.BlobStorage/stable/2026-04-06/generated_blob.json
index ae12d99bc555..b88af805b9b7 100644
--- a/specification/storage/data-plane/Microsoft.BlobStorage/stable/2026-04-06/generated_blob.json
+++ b/specification/storage/data-plane/Microsoft.BlobStorage/stable/2026-04-06/generated_blob.json
@@ -189,16 +189,38 @@
             "x-ms-client-name": "ifTags"
           },
           {
-            "$ref": "#/parameters/Azure.Core.ConditionalRequestHeaders.ifMatch"
+            "name": "If-Modified-Since",
+            "in": "header",
+            "description": "A date-time value. A request is made under the condition that the resource has been modified since the specified date-time.",
+            "required": false,
+            "type": "string",
+            "format": "date-time-rfc7231",
+            "x-ms-client-name": "ifModifiedSince"
           },
           {
-            "$ref": "#/parameters/Azure.Core.ConditionalRequestHeaders.ifNoneMatch"
+            "name": "If-Unmodified-Since",
+            "in": "header",
+            "description": "A date-time value. A request is made under the condition that the resource has not been modified since the specified date-time.",
+            "required": false,
+            "type": "string",
+            "format": "date-time-rfc7231",
+            "x-ms-client-name": "ifUnmodifiedSince"
           },
           {
-            "$ref": "#/parameters/Azure.Core.ConditionalRequestHeaders.ifUnmodifiedSince"
+            "name": "If-None-Match",
+            "in": "header",
+            "description": "A condition that must be met in order for the request to be processed.",
+            "required": false,
+            "type": "string",
+            "x-ms-client-name": "ifNoneMatch"
           },
           {
-            "$ref": "#/parameters/Azure.Core.ConditionalRequestHeaders.ifModifiedSince"
+            "name": "If-Match",
+            "in": "header",
+            "description": "A condition that must be met in order for the request to be processed.",
+            "required": false,
+            "type": "string",
+            "x-ms-client-name": "ifMatch"
           }
         ],
         "responses": {
@@ -7559,7 +7581,7 @@
           {
             "name": "x-ms-source-range",
             "in": "header",
-            "description": "Bytes of source data in the specified range. The length of this range should match the ContentLength header and x-ms-range/Range destination range header.",
+            "description": "Bytes of source data in the specified range.",
             "required": true,
             "type": "string",
             "x-ms-client-name": "sourceRange"
@@ -7603,7 +7625,7 @@
           {
             "name": "Range",
             "in": "header",
-            "description": "Bytes of source data in the specified range. The length of this range should match the ContentLength header and x-ms-range/Range destination range header.",
+            "description": "Bytes of data in the specified range.",
             "required": true,
             "type": "string",
             "x-ms-client-name": "range"
@@ -18273,44 +18295,5 @@
       "format": "byte"
     }
   },
-  "parameters": {
-    "Azure.Core.ConditionalRequestHeaders.ifMatch": {
-      "name": "If-Match",
-      "in": "header",
-      "description": "The request should only proceed if an entity matches this string.",
-      "required": false,
-      "type": "string",
-      "x-ms-parameter-location": "method",
-      "x-ms-client-name": "ifMatch"
-    },
-    "Azure.Core.ConditionalRequestHeaders.ifModifiedSince": {
-      "name": "If-Modified-Since",
-      "in": "header",
-      "description": "The request should only proceed if the entity was modified after this time.",
-      "required": false,
-      "type": "string",
-      "format": "date-time",
-      "x-ms-parameter-location": "method",
-      "x-ms-client-name": "ifModifiedSince"
-    },
-    "Azure.Core.ConditionalRequestHeaders.ifNoneMatch": {
-      "name": "If-None-Match",
-      "in": "header",
-      "description": "The request should only proceed if no entity matches this string.",
-      "required": false,
-      "type": "string",
-      "x-ms-parameter-location": "method",
-      "x-ms-client-name": "ifNoneMatch"
-    },
-    "Azure.Core.ConditionalRequestHeaders.ifUnmodifiedSince": {
-      "name": "If-Unmodified-Since",
-      "in": "header",
-      "description": "The request should only proceed if the entity was not modified after this time.",
-      "required": false,
-      "type": "string",
-      "format": "date-time",
-      "x-ms-parameter-location": "method",
-      "x-ms-client-name": "ifUnmodifiedSince"
-    }
-  }
+  "parameters": {}
 }
diff --git a/specification/storage/data-plane/Microsoft.BlobStorage/stable/2026-06-06/generated_blob.json b/specification/storage/data-plane/Microsoft.BlobStorage/stable/2026-06-06/generated_blob.json
index 8ae3dfae1dbf..934e5cd5f577 100644
--- a/specification/storage/data-plane/Microsoft.BlobStorage/stable/2026-06-06/generated_blob.json
+++ b/specification/storage/data-plane/Microsoft.BlobStorage/stable/2026-06-06/generated_blob.json
@@ -189,16 +189,38 @@
             "x-ms-client-name": "ifTags"
           },
           {
-            "$ref": "#/parameters/Azure.Core.ConditionalRequestHeaders.ifMatch"
+            "name": "If-Modified-Since",
+            "in": "header",
+            "description": "A date-time value. A request is made under the condition that the resource has been modified since the specified date-time.",
+            "required": false,
+            "type": "string",
+            "format": "date-time-rfc7231",
+            "x-ms-client-name": "ifModifiedSince"
           },
           {
-            "$ref": "#/parameters/Azure.Core.ConditionalRequestHeaders.ifNoneMatch"
+            "name": "If-Unmodified-Since",
+            "in": "header",
+            "description": "A date-time value. A request is made under the condition that the resource has not been modified since the specified date-time.",
+            "required": false,
+            "type": "string",
+            "format": "date-time-rfc7231",
+            "x-ms-client-name": "ifUnmodifiedSince"
           },
           {
-            "$ref": "#/parameters/Azure.Core.ConditionalRequestHeaders.ifUnmodifiedSince"
+            "name": "If-None-Match",
+            "in": "header",
+            "description": "A condition that must be met in order for the request to be processed.",
+            "required": false,
+            "type": "string",
+            "x-ms-client-name": "ifNoneMatch"
           },
           {
-            "$ref": "#/parameters/Azure.Core.ConditionalRequestHeaders.ifModifiedSince"
+            "name": "If-Match",
+            "in": "header",
+            "description": "A condition that must be met in order for the request to be processed.",
+            "required": false,
+            "type": "string",
+            "x-ms-client-name": "ifMatch"
           }
         ],
         "responses": {
@@ -7581,7 +7603,7 @@
           {
             "name": "x-ms-source-range",
             "in": "header",
-            "description": "Bytes of source data in the specified range. The length of this range should match the ContentLength header and x-ms-range/Range destination range header.",
+            "description": "Bytes of source data in the specified range.",
             "required": true,
             "type": "string",
             "x-ms-client-name": "sourceRange"
@@ -7625,7 +7647,7 @@
           {
             "name": "Range",
             "in": "header",
-            "description": "Bytes of source data in the specified range. The length of this range should match the ContentLength header and x-ms-range/Range destination range header.",
+            "description": "Bytes of data in the specified range.",
             "required": true,
             "type": "string",
             "x-ms-client-name": "range"
@@ -18336,44 +18358,5 @@
       "format": "byte"
     }
   },
-  "parameters": {
-    "Azure.Core.ConditionalRequestHeaders.ifMatch": {
-      "name": "If-Match",
-      "in": "header",
-      "description": "The request should only proceed if an entity matches this string.",
-      "required": false,
-      "type": "string",
-      "x-ms-parameter-location": "method",
-      "x-ms-client-name": "ifMatch"
-    },
-    "Azure.Core.ConditionalRequestHeaders.ifModifiedSince": {
-      "name": "If-Modified-Since",
-      "in": "header",
-      "description": "The request should only proceed if the entity was modified after this time.",
-      "required": false,
-      "type": "string",
-      "format": "date-time",
-      "x-ms-parameter-location": "method",
-      "x-ms-client-name": "ifModifiedSince"
-    },
-    "Azure.Core.ConditionalRequestHeaders.ifNoneMatch": {
-      "name": "If-None-Match",
-      "in": "header",
-      "description": "The request should only proceed if no entity matches this string.",
-      "required": false,
-      "type": "string",
-      "x-ms-parameter-location": "method",
-      "x-ms-client-name": "ifNoneMatch"
-    },
-    "Azure.Core.ConditionalRequestHeaders.ifUnmodifiedSince": {
-      "name": "If-Unmodified-Since",
-      "in": "header",
-      "description": "The request should only proceed if the entity was not modified after this time.",
-      "required": false,
-      "type": "string",
-      "format": "date-time",
-      "x-ms-parameter-location": "method",
-      "x-ms-client-name": "ifUnmodifiedSince"
-    }
-  }
+  "parameters": {}
 }