diff --git a/mmv1/products/accesscontextmanager/ServicePerimeter.yaml b/mmv1/products/accesscontextmanager/ServicePerimeter.yaml
index 6981e3369fe3..ce323709e7ca 100644
--- a/mmv1/products/accesscontextmanager/ServicePerimeter.yaml
+++ b/mmv1/products/accesscontextmanager/ServicePerimeter.yaml
@@ -65,7 +65,6 @@ async:
 custom_code:
   constants: 'templates/terraform/constants/access_context_manager.go.tmpl'
   encoder: 'templates/terraform/encoders/access_level_never_send_parent.go.tmpl'
-  pre_update: 'templates/terraform/pre_update/access_context_manager_service_perimeter.go.tmpl'
   custom_import: 'templates/terraform/custom_import/set_access_policy_parent_from_self_link.go.tmpl'
 # Skipping the sweeper due to the non-standard base_url
 exclude_sweeper: true
@@ -783,10 +782,3 @@ properties:
       actually enforcing them. This testing is done through analyzing the differences
       between currently enforced and suggested restrictions. useExplicitDryRunSpec must
       bet set to True if any of the fields in the spec are set to non-default values.
-  - name: 'etag'
-    type: Fingerprint
-    description: |
-      An opaque identifier for the current version of the ServicePerimeter. This
-      identifier does not follow any specific format. If an etag is not provided, the
-      operation will be performed as if a valid etag is provided.
-    output: true
diff --git a/mmv1/products/accesscontextmanager/ServicePerimeters.yaml b/mmv1/products/accesscontextmanager/ServicePerimeters.yaml
index 7f77cb8333fc..0c3b5a0ca944 100644
--- a/mmv1/products/accesscontextmanager/ServicePerimeters.yaml
+++ b/mmv1/products/accesscontextmanager/ServicePerimeters.yaml
@@ -94,13 +94,6 @@ properties:
           description: |
             Description of the ServicePerimeter and its use. Does not affect
             behavior.
-        - name: 'etag'
-          type: Fingerprint
-          description: |
-            An opaque identifier for the current version of the ServicePerimeter. This
-            identifier does not follow any specific format. If an etag is not provided, the
-            operation will be performed as if a valid etag is provided.
-          output: true
         - name: 'createTime'
           type: Time
           description: |
diff --git a/mmv1/templates/terraform/custom_flatten/accesscontextmanager_serviceperimeters_custom_flatten.go.tmpl b/mmv1/templates/terraform/custom_flatten/accesscontextmanager_serviceperimeters_custom_flatten.go.tmpl
index c6db1de5f7e7..231fc3f35c04 100644
--- a/mmv1/templates/terraform/custom_flatten/accesscontextmanager_serviceperimeters_custom_flatten.go.tmpl
+++ b/mmv1/templates/terraform/custom_flatten/accesscontextmanager_serviceperimeters_custom_flatten.go.tmpl
@@ -18,7 +18,6 @@ func flatten{{$.GetPrefix}}{{$.TitlelizeProperty}}(v interface{}, d *schema.Reso
 			"perimeter_type":            flattenAccessContextManagerServicePerimetersServicePerimetersPerimeterType(original["perimeterType"], d, config),
 			"status":                    flattenAccessContextManagerServicePerimetersServicePerimetersStatus(original["status"], d, config),
 			"spec":                      flattenAccessContextManagerServicePerimetersServicePerimetersSpec(original["spec"], d, config),
-			"etag":                      flattenAccessContextManagerServicePerimetersServicePerimetersEtag(original["etag"], d, config),
 			"use_explicit_dry_run_spec": flattenAccessContextManagerServicePerimetersServicePerimetersUseExplicitDryRunSpec(original["useExplicitDryRunSpec"], d, config),
 		})
 	}
@@ -39,10 +38,6 @@ func flattenAccessContextManagerServicePerimetersServicePerimetersName(v interfa
 	return v
 }
 
-func flattenAccessContextManagerServicePerimetersServicePerimetersEtag(v interface{}, d *schema.ResourceData, config *transport_tpg.Config) interface{} {
-	return v
-}
-
 func flattenAccessContextManagerServicePerimetersServicePerimetersTitle(v interface{}, d *schema.ResourceData, config *transport_tpg.Config) interface{} {
 	return v
 }
diff --git a/mmv1/templates/terraform/pre_update/access_context_manager_service_perimeter.go.tmpl b/mmv1/templates/terraform/pre_update/access_context_manager_service_perimeter.go.tmpl
deleted file mode 100644
index f1204301fd06..000000000000
--- a/mmv1/templates/terraform/pre_update/access_context_manager_service_perimeter.go.tmpl
+++ /dev/null
@@ -1,5 +0,0 @@
-if _, ok := d.GetOkExists("etag"); ok {
-	updateMask = append(updateMask, "etag")
-
-	url, err = transport_tpg.AddQueryParams(url, map[string]string{"updateMask": strings.Join(updateMask, ",")})
-}
diff --git a/mmv1/third_party/terraform/services/accesscontextmanager/resource_access_context_manager_service_perimeter_test.go.tmpl b/mmv1/third_party/terraform/services/accesscontextmanager/resource_access_context_manager_service_perimeter_test.go.tmpl
index 7007104794ec..754f2479e154 100644
--- a/mmv1/third_party/terraform/services/accesscontextmanager/resource_access_context_manager_service_perimeter_test.go.tmpl
+++ b/mmv1/third_party/terraform/services/accesscontextmanager/resource_access_context_manager_service_perimeter_test.go.tmpl
@@ -26,7 +26,6 @@ func testAccAccessContextManagerServicePerimeter_basicTest(t *testing.T) {
 		Steps: []resource.TestStep{
 			{
 				Config: testAccAccessContextManagerServicePerimeter_basic(org, "my policy", "level", "perimeter"),
-				Check: resource.TestCheckResourceAttrSet("google_access_context_manager_service_perimeter.test-access", "etag"),
 			},
 			{
 				ResourceName:      "google_access_context_manager_service_perimeter.test-access",