diff --git a/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2015_07_01/operations/_classic_administrators_operations.py b/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2015_07_01/operations/_classic_administrators_operations.py
index ebfa6a4c84e5..fd437331b775 100644
--- a/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2015_07_01/operations/_classic_administrators_operations.py
+++ b/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2015_07_01/operations/_classic_administrators_operations.py
@@ -25,6 +25,7 @@ class ClassicAdministratorsOperations(object):
     :param config: Configuration of service client.
     :param serializer: An object model serializer.
     :param deserializer: An object model deserializer.
+    :ivar api_version: The API version to use for this operation. Constant value: "2015-07-01".
     """
 
     models = models
@@ -34,16 +35,15 @@ def __init__(self, client, config, serializer, deserializer):
         self._client = client
         self._serialize = serializer
         self._deserialize = deserializer
+        self.api_version = "2015-07-01"
 
         self.config = config
 
     def list(
-            self, api_version, custom_headers=None, raw=False, **operation_config):
+            self, custom_headers=None, raw=False, **operation_config):
         """Gets service administrator, account administrator, and
         co-administrators for the subscription.
 
-        :param api_version: The API version to use for this operation.
-        :type api_version: str
         :param dict custom_headers: headers that will be added to the request
         :param bool raw: returns the direct response alongside the
          deserialized response
@@ -65,7 +65,7 @@ def prepare_request(next_link=None):
 
                 # Construct parameters
                 query_parameters = {}
-                query_parameters['api-version'] = self._serialize.query("api_version", api_version, 'str')
+                query_parameters['api-version'] = self._serialize.query("self.api_version", self.api_version, 'str')
 
             else:
                 url = next_link