diff --git a/google/monitoring/v3/monitoring_gapic.yaml b/google/monitoring/v3/monitoring_gapic.yaml
index c046ff04..749fe5fa 100644
--- a/google/monitoring/v3/monitoring_gapic.yaml
+++ b/google/monitoring/v3/monitoring_gapic.yaml
@@ -536,38 +536,43 @@ interfaces:
     resource_name_treatment: STATIC_TYPES
     timeout_millis: 60000
   - name: SendNotificationChannelVerificationCode
-    surface_treatments:
-    - include_languages:
-      - go
-      - java
-      - csharp
-      - ruby
-      - nodejs
-      - python
-      - php
-      visibility: DISABLED
+    flattening:
+      groups:
+        - parameters:
+          - name
+    required_fields:
+    - name
+    retry_codes_name: non_idempotent
+    retry_params_name: default
+    field_name_patterns:
+      name: notification_channel
+    timeout_millis: 60000
   - name: GetNotificationChannelVerificationCode
-    surface_treatments:
-    - include_languages:
-      - go
-      - java
-      - csharp
-      - ruby
-      - nodejs
-      - python
-      - php
-      visibility: DISABLED
+    flattening:
+      groups:
+        - parameters:
+          - name
+    required_fields:
+    - name
+    retry_codes_name: idempotent
+    retry_params_name: default
+    field_name_patterns:
+      name: notification_channel
+    timeout_millis: 60000
   - name: VerifyNotificationChannel
-    surface_treatments:
-    - include_languages:
-      - go
-      - java
-      - csharp
-      - ruby
-      - nodejs
-      - python
-      - php
-      visibility: DISABLED
+    flattening:
+      groups:
+        - parameters:
+          - name
+          - code
+    required_fields:
+    - name
+    - code
+    retry_codes_name: idempotent
+    retry_params_name: default
+    field_name_patterns:
+      name: notification_channel
+    timeout_millis: 60000
 - name: google.monitoring.v3.UptimeCheckService
   collections:
   - name_pattern: projects/{project}