diff --git a/mmv1/products/compute/RouterNat.yaml b/mmv1/products/compute/RouterNat.yaml
index e260b5c67fea..9b0d414391a1 100644
--- a/mmv1/products/compute/RouterNat.yaml
+++ b/mmv1/products/compute/RouterNat.yaml
@@ -105,6 +105,8 @@ examples:
       spoke_name: 'my-spoke'
 custom_code: !ruby/object:Provider::Terraform::CustomCode
   constants: 'templates/terraform/constants/router_nat.go.erb'
+  pre_create: 'templates/terraform/constants/router_nat_validate_action_active_range.go.erb'
+  pre_update: 'templates/terraform/constants/router_nat_validate_action_active_range.go.erb'
 custom_diff: [
   'resourceComputeRouterNatDrainNatIpsCustomDiff',
 ]
diff --git a/mmv1/templates/terraform/constants/router_nat_validate_action_active_range.go.erb b/mmv1/templates/terraform/constants/router_nat_validate_action_active_range.go.erb
new file mode 100644
index 000000000000..635e90f85472
--- /dev/null
+++ b/mmv1/templates/terraform/constants/router_nat_validate_action_active_range.go.erb
@@ -0,0 +1,29 @@
+<% unless version == 'ga' -%>
+// validates if the field action.source_nat_active_ranges is filled when the type is PRIVATE.
+natType := d.Get("type").(string)
+if natType == "PRIVATE" {
+	rules := d.Get("rules").(*schema.Set)
+	for _, rule := range rules.List() {
+		objRule := rule.(map[string]interface{})
+		actions := objRule["action"].([]interface{})
+
+		containAction := len(actions) != 0 && actions[0] != nil
+		containActiveRange := true
+
+		if containAction {
+			action := actions[0].(map[string]interface{})
+			sourceNatActiveRanges := action["source_nat_active_ranges"]
+			if sourceNatActiveRanges != nil {
+				sourceNatActiveRangesSet := sourceNatActiveRanges.(*schema.Set)
+				if len(sourceNatActiveRangesSet.List()) == 0 {
+					containActiveRange = false
+				}
+			}
+		}
+
+		if !containAction || !containActiveRange {
+			return fmt.Errorf("The rule for PRIVATE nat type must contain an action with source_nat_active_ranges set")
+		}
+	}
+}
+<% end -%>
\ No newline at end of file
diff --git a/mmv1/third_party/terraform/services/compute/resource_compute_router_nat_test.go.erb b/mmv1/third_party/terraform/services/compute/resource_compute_router_nat_test.go.erb
index 8c0c032a716a..b1c17157506f 100644
--- a/mmv1/third_party/terraform/services/compute/resource_compute_router_nat_test.go.erb
+++ b/mmv1/third_party/terraform/services/compute/resource_compute_router_nat_test.go.erb
@@ -533,6 +533,86 @@ func TestAccComputeRouterNat_withPrivateNatAndRules(t *testing.T) {
 		},
 	})
 }
+
+func TestAccComputeRouterNat_withPrivateNatAndEmptyAction(t *testing.T) {
+	t.Parallel()
+
+	testId := acctest.RandString(t, 10)
+	routerName := fmt.Sprintf("tf-test-router-private-nat-%s", testId)
+	hubName := fmt.Sprintf("%s-hub", routerName)
+	pEnv := envvar.GetTestProjectFromEnv()
+	ruleDescription := acctest.RandString(t, 10)
+	match := fmt.Sprintf("nexthop.hub == '//networkconnectivity.googleapis.com/projects/%s/locations/global/hubs/%s'", pEnv, hubName)
+	activeRangesNetworkOne := "google_compute_subnetwork.subnet1.self_link"
+	drainRangesEmpty := ""
+
+	acctest.VcrTest(t, resource.TestCase{
+		PreCheck:                 func() { acctest.AccTestPreCheck(t) },
+		ProtoV5ProviderFactories: acctest.ProtoV5ProviderFactories(t),
+		CheckDestroy:             testAccCheckComputeRouterNatDestroyProducer(t),
+		Steps: []resource.TestStep{
+			// (ERROR): Creation with empty action should fail
+			{
+				Config:      testAccComputeRouterNatRulesBasic_privateNatWithRuleAndEmptyAction(routerName, hubName, 100, ruleDescription, match),
+				ExpectError: regexp.MustCompile("The rule for PRIVATE nat type must contain an action with source_nat_active_ranges set"),
+			},
+			// Create NAT with action and active ranges set
+			{
+				Config: testAccComputeRouterNatRulesBasic_privateNatWithRuleAndActiveDrainRange(routerName, hubName, 100, ruleDescription, match, activeRangesNetworkOne, drainRangesEmpty),
+			},
+			{
+				ResourceName:      "google_compute_router_nat.foobar",
+				ImportState:       true,
+				ImportStateVerify: true,
+			},
+			// (ERROR) - Updating the rule by removing the action should fail
+			{
+				Config:      testAccComputeRouterNatRulesBasic_privateNatWithRuleAndEmptyAction(routerName, hubName, 100, ruleDescription, match),
+				ExpectError: regexp.MustCompile("The rule for PRIVATE nat type must contain an action with source_nat_active_ranges set"),
+			},
+		},
+	})
+}
+
+func TestAccComputeRouterNat_withPrivateNatAndEmptyActionActiveRanges(t *testing.T) {
+	t.Parallel()
+
+	testId := acctest.RandString(t, 10)
+	routerName := fmt.Sprintf("tf-test-router-private-nat-%s", testId)
+	hubName := fmt.Sprintf("%s-hub", routerName)
+	pEnv := envvar.GetTestProjectFromEnv()
+	ruleDescription := acctest.RandString(t, 10)
+	match := fmt.Sprintf("nexthop.hub == '//networkconnectivity.googleapis.com/projects/%s/locations/global/hubs/%s'", pEnv, hubName)
+	activeRangesNetworkOne := "google_compute_subnetwork.subnet1.self_link"
+	drainRangesEmpty := ""
+
+	acctest.VcrTest(t, resource.TestCase{
+		PreCheck:                 func() { acctest.AccTestPreCheck(t) },
+		ProtoV5ProviderFactories: acctest.ProtoV5ProviderFactories(t),
+		CheckDestroy:             testAccCheckComputeRouterNatDestroyProducer(t),
+		Steps: []resource.TestStep{
+			// (ERROR): Creation with empty action active ranges should fail
+			{
+				Config:      testAccComputeRouterNatRulesBasic_privateNatWithRuleAndEmptyActionActiveRanges(routerName, hubName, 100, ruleDescription, match),
+				ExpectError: regexp.MustCompile("The rule for PRIVATE nat type must contain an action with source_nat_active_ranges set"),
+			},
+			// Create NAT with action and active ranges set
+			{
+				Config: testAccComputeRouterNatRulesBasic_privateNatWithRuleAndActiveDrainRange(routerName, hubName, 100, ruleDescription, match, activeRangesNetworkOne, drainRangesEmpty),
+			},
+			{
+				ResourceName:      "google_compute_router_nat.foobar",
+				ImportState:       true,
+				ImportStateVerify: true,
+			},
+			// (ERROR) - Updating the rule by erasing the action active ranges should fail
+			{
+				Config:      testAccComputeRouterNatRulesBasic_privateNatWithRuleAndEmptyActionActiveRanges(routerName, hubName, 100, ruleDescription, match),
+				ExpectError: regexp.MustCompile("The rule for PRIVATE nat type must contain an action with source_nat_active_ranges set"),
+			},
+		},
+	})
+}
 <% end -%>
 
 func testAccCheckComputeRouterNatDestroyProducer(t *testing.T) func(s *terraform.State) error {
@@ -1655,4 +1735,62 @@ resource "google_compute_router_nat" "foobar" {
 `, testAccComputeRouterNatBaseResourcesWithPrivateNatSubnetworks(routerName, hubName), routerName, ruleNumber, ruleDescription, match, activeRanges, drainRanges)
 }
 
+func testAccComputeRouterNatRulesBasic_privateNatWithRuleAndEmptyAction(routerName, hubName string, ruleNumber int, ruleDescription, match string) string {
+	return fmt.Sprintf(`
+%s
+
+resource "google_compute_router_nat" "foobar" {
+  name                                = "%s"
+  router                              = google_compute_router.foobar.name
+  region                              = google_compute_router.foobar.region
+  source_subnetwork_ip_ranges_to_nat  = "LIST_OF_SUBNETWORKS"
+  type                                = "PRIVATE" 
+  enable_dynamic_port_allocation      = false
+  enable_endpoint_independent_mapping = false
+  min_ports_per_vm = 32
+  subnetwork {
+    name                    = google_compute_subnetwork.subnet1.id
+    source_ip_ranges_to_nat = ["ALL_IP_RANGES"]
+  }
+
+  rules {
+    rule_number = %d
+    description = "%s"
+    match       = "%s"
+    # action is missing
+  }
+}
+`, testAccComputeRouterNatBaseResourcesWithPrivateNatSubnetworks(routerName, hubName), routerName, ruleNumber, ruleDescription, match)
+}
+
+func testAccComputeRouterNatRulesBasic_privateNatWithRuleAndEmptyActionActiveRanges(routerName, hubName string, ruleNumber int, ruleDescription, match string) string {
+	return fmt.Sprintf(`
+%s
+
+resource "google_compute_router_nat" "foobar" {
+  name                                = "%s"
+  router                              = google_compute_router.foobar.name
+  region                              = google_compute_router.foobar.region
+  source_subnetwork_ip_ranges_to_nat  = "LIST_OF_SUBNETWORKS"
+  type                                = "PRIVATE" 
+  enable_dynamic_port_allocation      = false
+  enable_endpoint_independent_mapping = false
+  min_ports_per_vm = 32
+  subnetwork {
+    name                    = google_compute_subnetwork.subnet1.id
+    source_ip_ranges_to_nat = ["ALL_IP_RANGES"]
+  }
+
+  rules {
+    rule_number = %d
+    description = "%s"
+    match       = "%s"
+    action {
+      source_nat_active_ranges = []
+    }
+  }
+}
+`, testAccComputeRouterNatBaseResourcesWithPrivateNatSubnetworks(routerName, hubName), routerName, ruleNumber, ruleDescription, match)
+}
+
 <% end -%>
\ No newline at end of file