diff --git a/specification/iotcentral/resource-manager/Microsoft.IoTCentral/preview/2021-11-01-preview/iotcentral.json b/specification/iotcentral/resource-manager/Microsoft.IoTCentral/preview/2021-11-01-preview/iotcentral.json
index d02042874904..47d4b4a94325 100644
--- a/specification/iotcentral/resource-manager/Microsoft.IoTCentral/preview/2021-11-01-preview/iotcentral.json
+++ b/specification/iotcentral/resource-manager/Microsoft.IoTCentral/preview/2021-11-01-preview/iotcentral.json
@@ -932,7 +932,8 @@
       "x-ms-enum": {
         "name": "PublicNetworkAccess",
         "modelAsString": true
-      }
+      },
+      "default": "Enabled"
     },
     "NetworkRuleSets": {
       "description": "Network Rule Set Properties of this IoT Central application.",
@@ -940,11 +941,13 @@
       "properties": {
         "applyToDevices": {
           "description": "Whether these rules apply for device connectivity to IoT Hub and Device Provisioning service associated with this application.",
-          "type": "boolean"
+          "type": "boolean",
+          "default": "false"
         },
         "applyToIoTCentral": {
           "description": "Whether these rules apply for connectivity via IoT Central web portal and APIs.",
-          "type": "boolean"
+          "type": "boolean",
+          "default": "false"
         },
         "defaultAction": {
           "description": "The default network action to apply.",
@@ -960,7 +963,11 @@
             "filterName"
           ]
         }
-      }
+      },
+      "x-ms-mutability": [
+        "update",
+        "read"
+      ]
     },
     "NetworkRuleSetIpRule": {
       "description": "An object for an IP range that will be allowed access.",
@@ -998,7 +1005,8 @@
       "x-ms-enum": {
         "name": "NetworkAction",
         "modelAsString": true
-      }
+      },
+      "default": "Allow"
     },
     "AppState": {
       "description": "The current state of the application.",
diff --git a/specification/iotcentral/resource-manager/Microsoft.IoTCentral/stable/2018-09-01/iotcentral.json b/specification/iotcentral/resource-manager/Microsoft.IoTCentral/stable/2018-09-01/iotcentral.json
index f5b97468268f..f37243117f8a 100644
--- a/specification/iotcentral/resource-manager/Microsoft.IoTCentral/stable/2018-09-01/iotcentral.json
+++ b/specification/iotcentral/resource-manager/Microsoft.IoTCentral/stable/2018-09-01/iotcentral.json
@@ -513,9 +513,41 @@
             "create",
             "read"
           ]
+        },
+        "state": {
+          "description": "The current state of the application.",
+          "$ref": "#/definitions/AppState"
+        },
+        "geography": {
+          "description": "The geography the application is in.",
+          "type": "string",
+          "readOnly": true
+        },
+        "thumbnailUrl": {
+          "description": "The URI for the thumbnail image used in the application.",
+          "type": "string",
+          "readOnly": true
+        },
+        "tenant": {
+          "description": "The tenant ID the application belongs to.",
+          "type": "string",
+          "readOnly": true
         }
       }
     },
+    "AppState": {
+      "description": "The current state of the application.",
+      "type": "string",
+      "enum": [
+        "created",
+        "suspended"
+      ],
+      "x-ms-enum": {
+        "name": "AppState",
+        "modelAsString": true
+      },
+      "readOnly": true
+    },
     "AppSkuInfo": {
       "description": "Information about the SKU of the IoT Central application.",
       "type": "object",
diff --git a/specification/iotcentral/resource-manager/readme.python.md b/specification/iotcentral/resource-manager/readme.python.md
index 8488027b7423..a50ad0ebe301 100644
--- a/specification/iotcentral/resource-manager/readme.python.md
+++ b/specification/iotcentral/resource-manager/readme.python.md
@@ -17,3 +17,14 @@ clear-output-folder: true
 no-namespace-folders: true
 output-folder: $(python-sdks-folder)/iothub/azure-mgmt-iotcentral/azure/mgmt/iotcentral
 ```
+
+``` yaml $(python)
+directive:
+  - from: iotcentral.json
+    where: $.definitions.NetworkRuleSets["properties"]["applyToDevices"]
+    transform: $['default'] = 'False'
+
+  - from: iotcentral.json
+    where: $.definitions.NetworkRuleSets["properties"]["applyToIoTCentral"]
+    transform: $['default'] = 'False'
+```