diff --git a/mmv1/api/resource/iam_policy.go b/mmv1/api/resource/iam_policy.go
index 0f8d7f1017a0..5746e7e0b764 100644
--- a/mmv1/api/resource/iam_policy.go
+++ b/mmv1/api/resource/iam_policy.go
@@ -99,6 +99,10 @@ type IamPolicy struct {
 	// How the API supports IAM conditions
 	IamConditionsRequestType string `yaml:"iam_conditions_request_type,omitempty"`
 
+	// [Optional] Whether to include an updateMask in the setIamPolicy request.
+	// Mandatory for older APIs like DNS to support IAM conditions.
+	UpdateMask bool `yaml:"update_mask,omitempty"`
+
 	// Allows us to override the base_url of the resource. This is required for Cloud Run as the
 	// IAM resources use an entirely different base URL from the actual resource
 	BaseUrl string `yaml:"base_url,omitempty"`
diff --git a/mmv1/products/dns/ManagedZone.yaml b/mmv1/products/dns/ManagedZone.yaml
index cb3e0d63f034..e0526971498d 100644
--- a/mmv1/products/dns/ManagedZone.yaml
+++ b/mmv1/products/dns/ManagedZone.yaml
@@ -33,6 +33,9 @@ iam_policy:
   method_name_separator: ':'
   fetch_iam_policy_verb: 'POST'
   parent_resource_attribute: 'managed_zone'
+  iam_conditions_request_type: 'QUERY_PARAM_NESTED'
+  allowed_iam_role: 'roles/dns.admin'
+  update_mask: true
   import_format:
     - 'projects/{{project}}/managedZones/{{managed_zone}}'
     - '{{project}}/{{managed_zone}}'
@@ -123,6 +126,13 @@ examples:
       dns_name: 'services.example.com.'
     test_vars_overrides:
       'dns_name': '"services.example.com-" + acctest.RandString(t, 10) + "."'
+  - name: 'dns_managed_zone_iam_condition'
+    primary_resource_id: 'default'
+    vars:
+      dns_name: 'example.com.'
+      managed_zone_name: 'example-zone'
+    test_vars_overrides:
+      'dns_name': '"conditions.example.com-" + acctest.RandString(t, 10) + "."'
 virtual_fields:
   - name: 'force_destroy'
     description: 'Set this true to delete all records in the zone.'
diff --git a/mmv1/templates/terraform/examples/dns_managed_zone_iam_condition.tf.tmpl b/mmv1/templates/terraform/examples/dns_managed_zone_iam_condition.tf.tmpl
new file mode 100644
index 000000000000..c376eb957253
--- /dev/null
+++ b/mmv1/templates/terraform/examples/dns_managed_zone_iam_condition.tf.tmpl
@@ -0,0 +1,19 @@
+resource "google_dns_managed_zone" "default" {
+  name        = "{{index $.Vars "managed_zone_name"}}"
+  dns_name    = "{{index $.Vars "dns_name"}}"
+  description = "Example zone for IAM conditions"
+}
+
+resource "google_dns_managed_zone_iam_member" "condition_test" {
+  project      = google_dns_managed_zone.default.project
+  managed_zone = google_dns_managed_zone.default.name
+  role         = "roles/dns.admin"
+  member       = "user:admin@hashicorptest.com"
+
+  condition {
+    title       = "Exact Record Match"
+    description = "Allow modifying only api.example.com. A records"
+    # Mandatory pass-through clause for parent Managed Zone checks
+    expression = "(resource.type == 'dns.googleapis.com/ResourceRecordSet' && resource.name.endsWith('/rrsets/api.{{index $.Vars "dns_name"}}/A')) || (resource.type != 'dns.googleapis.com/ResourceRecordSet')"
+  }
+}
diff --git a/mmv1/templates/terraform/iam_policy.go.tmpl b/mmv1/templates/terraform/iam_policy.go.tmpl
index 22b21fa5dc59..f7aee9562903 100644
--- a/mmv1/templates/terraform/iam_policy.go.tmpl
+++ b/mmv1/templates/terraform/iam_policy.go.tmpl
@@ -293,6 +293,10 @@ func (u *{{ $.ResourceName }}IamUpdater) SetResourceIamPolicy(policy *cloudresou
 {{ if and $.IamPolicy $.IamPolicy.WrappedPolicyObj -}}
 	obj := make(map[string]interface{})
 	obj["policy"] = json
+	{{- if $.IamPolicy.UpdateMask }}
+	// Core APIs require the mask to acknowledge policy version 3 (conditions)
+	obj["updateMask"] = "bindings,etag,version"
+	{{- end }}
 {{- else }}
 	obj := json
 {{- end }}
@@ -356,4 +360,4 @@ func (u *{{ $.ResourceName }}IamUpdater) GetMutexKey() string {
 
 func (u *{{ $.ResourceName }}IamUpdater) DescribeResource() string {
 	return fmt.Sprintf("{{ lower $.ProductMetadata.Name }} {{ lower $.Name }} %q", u.GetResourceId())
-}
\ No newline at end of file
+}