diff --git a/AdvisoryNotifications/metadata/V1/Service.php b/AdvisoryNotifications/metadata/V1/Service.php
index 1b9b2b5507e0..7c16188aa28f 100644
Binary files a/AdvisoryNotifications/metadata/V1/Service.php and b/AdvisoryNotifications/metadata/V1/Service.php differ
diff --git a/AdvisoryNotifications/samples/V1/AdvisoryNotificationsServiceClient/get_notification.php b/AdvisoryNotifications/samples/V1/AdvisoryNotificationsServiceClient/get_notification.php
index 5496d3614a34..fcd899daed22 100644
--- a/AdvisoryNotifications/samples/V1/AdvisoryNotificationsServiceClient/get_notification.php
+++ b/AdvisoryNotifications/samples/V1/AdvisoryNotificationsServiceClient/get_notification.php
@@ -33,7 +33,8 @@
  *
  * @param string $formattedName A name of the notification to retrieve.
  *                              Format:
- *                              organizations/{organization}/locations/{location}/notifications/{notification}. Please see
+ *                              organizations/{organization}/locations/{location}/notifications/{notification}
+ *                              or projects/{projects}/locations/{location}/notifications/{notification}. Please see
  *                              {@see AdvisoryNotificationsServiceClient::notificationName()} for help formatting this field.
  */
 function get_notification_sample(string $formattedName): void
diff --git a/AdvisoryNotifications/samples/V1/AdvisoryNotificationsServiceClient/list_notifications.php b/AdvisoryNotifications/samples/V1/AdvisoryNotificationsServiceClient/list_notifications.php
index 83c4a13102ce..15ef2e226114 100644
--- a/AdvisoryNotifications/samples/V1/AdvisoryNotificationsServiceClient/list_notifications.php
+++ b/AdvisoryNotifications/samples/V1/AdvisoryNotificationsServiceClient/list_notifications.php
@@ -33,8 +33,9 @@
  * Lists notifications under a given parent.
  *
  * @param string $formattedParent The parent, which owns this collection of notifications.
- *                                Must be of the form "organizations/{organization}/locations/{location}". Please see
- *                                {@see AdvisoryNotificationsServiceClient::locationName()} for help formatting this field.
+ *                                Must be of the form "organizations/{organization}/locations/{location}"
+ *                                or "projects/{project}/locations/{location}"
+ *                                Please see {@see AdvisoryNotificationsServiceClient::locationName()} for help formatting this field.
  */
 function list_notifications_sample(string $formattedParent): void
 {
diff --git a/AdvisoryNotifications/src/V1/Client/AdvisoryNotificationsServiceClient.php b/AdvisoryNotifications/src/V1/Client/AdvisoryNotificationsServiceClient.php
index 9fec0786cf75..bfb3a771ea60 100644
--- a/AdvisoryNotifications/src/V1/Client/AdvisoryNotificationsServiceClient.php
+++ b/AdvisoryNotifications/src/V1/Client/AdvisoryNotificationsServiceClient.php
@@ -140,6 +140,78 @@ public static function notificationName(string $organization, string $location,
         ]);
     }
 
+    /**
+     * Formats a string containing the fully-qualified path to represent a
+     * organization_location resource.
+     *
+     * @param string $organization
+     * @param string $location
+     *
+     * @return string The formatted organization_location resource.
+     */
+    public static function organizationLocationName(string $organization, string $location): string
+    {
+        return self::getPathTemplate('organizationLocation')->render([
+            'organization' => $organization,
+            'location' => $location,
+        ]);
+    }
+
+    /**
+     * Formats a string containing the fully-qualified path to represent a
+     * organization_location_notification resource.
+     *
+     * @param string $organization
+     * @param string $location
+     * @param string $notification
+     *
+     * @return string The formatted organization_location_notification resource.
+     */
+    public static function organizationLocationNotificationName(string $organization, string $location, string $notification): string
+    {
+        return self::getPathTemplate('organizationLocationNotification')->render([
+            'organization' => $organization,
+            'location' => $location,
+            'notification' => $notification,
+        ]);
+    }
+
+    /**
+     * Formats a string containing the fully-qualified path to represent a
+     * project_location resource.
+     *
+     * @param string $project
+     * @param string $location
+     *
+     * @return string The formatted project_location resource.
+     */
+    public static function projectLocationName(string $project, string $location): string
+    {
+        return self::getPathTemplate('projectLocation')->render([
+            'project' => $project,
+            'location' => $location,
+        ]);
+    }
+
+    /**
+     * Formats a string containing the fully-qualified path to represent a
+     * project_location_notification resource.
+     *
+     * @param string $project
+     * @param string $location
+     * @param string $notification
+     *
+     * @return string The formatted project_location_notification resource.
+     */
+    public static function projectLocationNotificationName(string $project, string $location, string $notification): string
+    {
+        return self::getPathTemplate('projectLocationNotification')->render([
+            'project' => $project,
+            'location' => $location,
+            'notification' => $notification,
+        ]);
+    }
+
     /**
      * Formats a string containing the fully-qualified path to represent a settings
      * resource.
@@ -163,6 +235,10 @@ public static function settingsName(string $organization, string $location): str
      * Template: Pattern
      * - location: organizations/{organization}/locations/{location}
      * - notification: organizations/{organization}/locations/{location}/notifications/{notification}
+     * - organizationLocation: organizations/{organization}/locations/{location}
+     * - organizationLocationNotification: organizations/{organization}/locations/{location}/notifications/{notification}
+     * - projectLocation: projects/{project}/locations/{location}
+     * - projectLocationNotification: projects/{project}/locations/{location}/notifications/{notification}
      * - settings: organizations/{organization}/locations/{location}/settings
      *
      * The optional $template argument can be supplied to specify a particular pattern,
diff --git a/AdvisoryNotifications/src/V1/Gapic/AdvisoryNotificationsServiceGapicClient.php b/AdvisoryNotifications/src/V1/Gapic/AdvisoryNotificationsServiceGapicClient.php
index 18559a7e9493..f3be450e6375 100644
--- a/AdvisoryNotifications/src/V1/Gapic/AdvisoryNotificationsServiceGapicClient.php
+++ b/AdvisoryNotifications/src/V1/Gapic/AdvisoryNotificationsServiceGapicClient.php
@@ -91,6 +91,14 @@ class AdvisoryNotificationsServiceGapicClient
 
     private static $notificationNameTemplate;
 
+    private static $organizationLocationNameTemplate;
+
+    private static $organizationLocationNotificationNameTemplate;
+
+    private static $projectLocationNameTemplate;
+
+    private static $projectLocationNotificationNameTemplate;
+
     private static $settingsNameTemplate;
 
     private static $pathTemplateMap;
@@ -145,6 +153,50 @@ private static function getNotificationNameTemplate()
         return self::$notificationNameTemplate;
     }
 
+    private static function getOrganizationLocationNameTemplate()
+    {
+        if (self::$organizationLocationNameTemplate == null) {
+            self::$organizationLocationNameTemplate = new PathTemplate(
+                'organizations/{organization}/locations/{location}'
+            );
+        }
+
+        return self::$organizationLocationNameTemplate;
+    }
+
+    private static function getOrganizationLocationNotificationNameTemplate()
+    {
+        if (self::$organizationLocationNotificationNameTemplate == null) {
+            self::$organizationLocationNotificationNameTemplate = new PathTemplate(
+                'organizations/{organization}/locations/{location}/notifications/{notification}'
+            );
+        }
+
+        return self::$organizationLocationNotificationNameTemplate;
+    }
+
+    private static function getProjectLocationNameTemplate()
+    {
+        if (self::$projectLocationNameTemplate == null) {
+            self::$projectLocationNameTemplate = new PathTemplate(
+                'projects/{project}/locations/{location}'
+            );
+        }
+
+        return self::$projectLocationNameTemplate;
+    }
+
+    private static function getProjectLocationNotificationNameTemplate()
+    {
+        if (self::$projectLocationNotificationNameTemplate == null) {
+            self::$projectLocationNotificationNameTemplate = new PathTemplate(
+                'projects/{project}/locations/{location}/notifications/{notification}'
+            );
+        }
+
+        return self::$projectLocationNotificationNameTemplate;
+    }
+
     private static function getSettingsNameTemplate()
     {
         if (self::$settingsNameTemplate == null) {
@@ -162,6 +214,10 @@ private static function getPathTemplateMap()
             self::$pathTemplateMap = [
                 'location' => self::getLocationNameTemplate(),
                 'notification' => self::getNotificationNameTemplate(),
+                'organizationLocation' => self::getOrganizationLocationNameTemplate(),
+                'organizationLocationNotification' => self::getOrganizationLocationNotificationNameTemplate(),
+                'projectLocation' => self::getProjectLocationNameTemplate(),
+                'projectLocationNotification' => self::getProjectLocationNotificationNameTemplate(),
                 'settings' => self::getSettingsNameTemplate(),
             ];
         }
@@ -208,6 +264,84 @@ public static function notificationName(
         ]);
     }
 
+    /**
+     * Formats a string containing the fully-qualified path to represent a
+     * organization_location resource.
+     *
+     * @param string $organization
+     * @param string $location
+     *
+     * @return string The formatted organization_location resource.
+     */
+    public static function organizationLocationName($organization, $location)
+    {
+        return self::getOrganizationLocationNameTemplate()->render([
+            'organization' => $organization,
+            'location' => $location,
+        ]);
+    }
+
+    /**
+     * Formats a string containing the fully-qualified path to represent a
+     * organization_location_notification resource.
+     *
+     * @param string $organization
+     * @param string $location
+     * @param string $notification
+     *
+     * @return string The formatted organization_location_notification resource.
+     */
+    public static function organizationLocationNotificationName(
+        $organization,
+        $location,
+        $notification
+    ) {
+        return self::getOrganizationLocationNotificationNameTemplate()->render([
+            'organization' => $organization,
+            'location' => $location,
+            'notification' => $notification,
+        ]);
+    }
+
+    /**
+     * Formats a string containing the fully-qualified path to represent a
+     * project_location resource.
+     *
+     * @param string $project
+     * @param string $location
+     *
+     * @return string The formatted project_location resource.
+     */
+    public static function projectLocationName($project, $location)
+    {
+        return self::getProjectLocationNameTemplate()->render([
+            'project' => $project,
+            'location' => $location,
+        ]);
+    }
+
+    /**
+     * Formats a string containing the fully-qualified path to represent a
+     * project_location_notification resource.
+     *
+     * @param string $project
+     * @param string $location
+     * @param string $notification
+     *
+     * @return string The formatted project_location_notification resource.
+     */
+    public static function projectLocationNotificationName(
+        $project,
+        $location,
+        $notification
+    ) {
+        return self::getProjectLocationNotificationNameTemplate()->render([
+            'project' => $project,
+            'location' => $location,
+            'notification' => $notification,
+        ]);
+    }
+
     /**
      * Formats a string containing the fully-qualified path to represent a settings
      * resource.
@@ -231,6 +365,10 @@ public static function settingsName($organization, $location)
      * Template: Pattern
      * - location: organizations/{organization}/locations/{location}
      * - notification: organizations/{organization}/locations/{location}/notifications/{notification}
+     * - organizationLocation: organizations/{organization}/locations/{location}
+     * - organizationLocationNotification: organizations/{organization}/locations/{location}/notifications/{notification}
+     * - projectLocation: projects/{project}/locations/{location}
+     * - projectLocationNotification: projects/{project}/locations/{location}/notifications/{notification}
      * - settings: organizations/{organization}/locations/{location}/settings
      *
      * The optional $template argument can be supplied to specify a particular pattern,
@@ -348,7 +486,8 @@ public function __construct(array $options = [])
      *
      * @param string $name         Required. A name of the notification to retrieve.
      *                             Format:
-     *                             organizations/{organization}/locations/{location}/notifications/{notification}.
+     *                             organizations/{organization}/locations/{location}/notifications/{notification}
+     *                             or projects/{projects}/locations/{location}/notifications/{notification}.
      * @param array  $optionalArgs {
      *     Optional.
      *
@@ -469,7 +608,8 @@ public function getSettings($name, array $optionalArgs = [])
      * ```
      *
      * @param string $parent       Required. The parent, which owns this collection of notifications.
-     *                             Must be of the form "organizations/{organization}/locations/{location}".
+     *                             Must be of the form "organizations/{organization}/locations/{location}"
+     *                             or "projects/{project}/locations/{location}"
      * @param array  $optionalArgs {
      *     Optional.
      *
diff --git a/AdvisoryNotifications/src/V1/GetNotificationRequest.php b/AdvisoryNotifications/src/V1/GetNotificationRequest.php
index bfb43fef07e5..58d3b8a07814 100644
--- a/AdvisoryNotifications/src/V1/GetNotificationRequest.php
+++ b/AdvisoryNotifications/src/V1/GetNotificationRequest.php
@@ -18,7 +18,8 @@ class GetNotificationRequest extends \Google\Protobuf\Internal\Message
     /**
      * Required. A name of the notification to retrieve.
      * Format:
-     * organizations/{organization}/locations/{location}/notifications/{notification}.
+     * organizations/{organization}/locations/{location}/notifications/{notification}
+     * or projects/{projects}/locations/{location}/notifications/{notification}.
      *
      * Generated from protobuf field <code>string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = {</code>
      */
@@ -37,7 +38,8 @@ class GetNotificationRequest extends \Google\Protobuf\Internal\Message
     /**
      * @param string $name Required. A name of the notification to retrieve.
      *                     Format:
-     *                     organizations/{organization}/locations/{location}/notifications/{notification}. Please see
+     *                     organizations/{organization}/locations/{location}/notifications/{notification}
+     *                     or projects/{projects}/locations/{location}/notifications/{notification}. Please see
      *                     {@see AdvisoryNotificationsServiceClient::notificationName()} for help formatting this field.
      *
      * @return \Google\Cloud\AdvisoryNotifications\V1\GetNotificationRequest
@@ -59,7 +61,8 @@ public static function build(string $name): self
      *     @type string $name
      *           Required. A name of the notification to retrieve.
      *           Format:
-     *           organizations/{organization}/locations/{location}/notifications/{notification}.
+     *           organizations/{organization}/locations/{location}/notifications/{notification}
+     *           or projects/{projects}/locations/{location}/notifications/{notification}.
      *     @type string $language_code
      *           ISO code for requested localization language. If unset, will be
      *           interpereted as "en". If the requested language is valid, but not supported
@@ -76,7 +79,8 @@ public function __construct($data = NULL) {
     /**
      * Required. A name of the notification to retrieve.
      * Format:
-     * organizations/{organization}/locations/{location}/notifications/{notification}.
+     * organizations/{organization}/locations/{location}/notifications/{notification}
+     * or projects/{projects}/locations/{location}/notifications/{notification}.
      *
      * Generated from protobuf field <code>string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = {</code>
      * @return string
@@ -89,7 +93,8 @@ public function getName()
     /**
      * Required. A name of the notification to retrieve.
      * Format:
-     * organizations/{organization}/locations/{location}/notifications/{notification}.
+     * organizations/{organization}/locations/{location}/notifications/{notification}
+     * or projects/{projects}/locations/{location}/notifications/{notification}.
      *
      * Generated from protobuf field <code>string name = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = {</code>
      * @param string $var
diff --git a/AdvisoryNotifications/src/V1/ListNotificationsRequest.php b/AdvisoryNotifications/src/V1/ListNotificationsRequest.php
index 9d9824871e2a..9f6eb8532fb5 100644
--- a/AdvisoryNotifications/src/V1/ListNotificationsRequest.php
+++ b/AdvisoryNotifications/src/V1/ListNotificationsRequest.php
@@ -17,7 +17,8 @@ class ListNotificationsRequest extends \Google\Protobuf\Internal\Message
 {
     /**
      * Required. The parent, which owns this collection of notifications.
-     * Must be of the form "organizations/{organization}/locations/{location}".
+     * Must be of the form "organizations/{organization}/locations/{location}"
+     * or "projects/{project}/locations/{location}"
      *
      * Generated from protobuf field <code>string parent = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = {</code>
      */
@@ -59,8 +60,9 @@ class ListNotificationsRequest extends \Google\Protobuf\Internal\Message
 
     /**
      * @param string $parent Required. The parent, which owns this collection of notifications.
-     *                       Must be of the form "organizations/{organization}/locations/{location}". Please see
-     *                       {@see AdvisoryNotificationsServiceClient::locationName()} for help formatting this field.
+     *                       Must be of the form "organizations/{organization}/locations/{location}"
+     *                       or "projects/{project}/locations/{location}"
+     *                       Please see {@see AdvisoryNotificationsServiceClient::locationName()} for help formatting this field.
      *
      * @return \Google\Cloud\AdvisoryNotifications\V1\ListNotificationsRequest
      *
@@ -80,7 +82,8 @@ public static function build(string $parent): self
      *
      *     @type string $parent
      *           Required. The parent, which owns this collection of notifications.
-     *           Must be of the form "organizations/{organization}/locations/{location}".
+     *           Must be of the form "organizations/{organization}/locations/{location}"
+     *           or "projects/{project}/locations/{location}"
      *     @type int $page_size
      *           The maximum number of notifications to return. The service may return
      *           fewer than this value. If unspecified or equal to 0, at most 50
@@ -108,7 +111,8 @@ public function __construct($data = NULL) {
 
     /**
      * Required. The parent, which owns this collection of notifications.
-     * Must be of the form "organizations/{organization}/locations/{location}".
+     * Must be of the form "organizations/{organization}/locations/{location}"
+     * or "projects/{project}/locations/{location}"
      *
      * Generated from protobuf field <code>string parent = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = {</code>
      * @return string
@@ -120,7 +124,8 @@ public function getParent()
 
     /**
      * Required. The parent, which owns this collection of notifications.
-     * Must be of the form "organizations/{organization}/locations/{location}".
+     * Must be of the form "organizations/{organization}/locations/{location}"
+     * or "projects/{project}/locations/{location}"
      *
      * Generated from protobuf field <code>string parent = 1 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = {</code>
      * @param string $var
diff --git a/AdvisoryNotifications/src/V1/Notification.php b/AdvisoryNotifications/src/V1/Notification.php
index b18cabfae52f..76a52ae2a43f 100644
--- a/AdvisoryNotifications/src/V1/Notification.php
+++ b/AdvisoryNotifications/src/V1/Notification.php
@@ -19,7 +19,8 @@ class Notification extends \Google\Protobuf\Internal\Message
     /**
      * The resource name of the notification.
      * Format:
-     * organizations/{organization}/locations/{location}/notifications/{notification}.
+     * organizations/{organization}/locations/{location}/notifications/{notification}
+     * or projects/{project}/locations/{location}/notifications/{notification}.
      *
      * Generated from protobuf field <code>string name = 1;</code>
      */
@@ -58,7 +59,8 @@ class Notification extends \Google\Protobuf\Internal\Message
      *     @type string $name
      *           The resource name of the notification.
      *           Format:
-     *           organizations/{organization}/locations/{location}/notifications/{notification}.
+     *           organizations/{organization}/locations/{location}/notifications/{notification}
+     *           or projects/{project}/locations/{location}/notifications/{notification}.
      *     @type \Google\Cloud\AdvisoryNotifications\V1\Subject $subject
      *           The subject line of the notification.
      *     @type array<\Google\Cloud\AdvisoryNotifications\V1\Message>|\Google\Protobuf\Internal\RepeatedField $messages
@@ -77,7 +79,8 @@ public function __construct($data = NULL) {
     /**
      * The resource name of the notification.
      * Format:
-     * organizations/{organization}/locations/{location}/notifications/{notification}.
+     * organizations/{organization}/locations/{location}/notifications/{notification}
+     * or projects/{project}/locations/{location}/notifications/{notification}.
      *
      * Generated from protobuf field <code>string name = 1;</code>
      * @return string
@@ -90,7 +93,8 @@ public function getName()
     /**
      * The resource name of the notification.
      * Format:
-     * organizations/{organization}/locations/{location}/notifications/{notification}.
+     * organizations/{organization}/locations/{location}/notifications/{notification}
+     * or projects/{project}/locations/{location}/notifications/{notification}.
      *
      * Generated from protobuf field <code>string name = 1;</code>
      * @param string $var
diff --git a/AdvisoryNotifications/src/V1/resources/advisory_notifications_service_descriptor_config.php b/AdvisoryNotifications/src/V1/resources/advisory_notifications_service_descriptor_config.php
index 550c8936d515..ebb3a6ad425e 100644
--- a/AdvisoryNotifications/src/V1/resources/advisory_notifications_service_descriptor_config.php
+++ b/AdvisoryNotifications/src/V1/resources/advisory_notifications_service_descriptor_config.php
@@ -63,6 +63,10 @@
             'templateMap' => [
                 'location' => 'organizations/{organization}/locations/{location}',
                 'notification' => 'organizations/{organization}/locations/{location}/notifications/{notification}',
+                'organizationLocation' => 'organizations/{organization}/locations/{location}',
+                'organizationLocationNotification' => 'organizations/{organization}/locations/{location}/notifications/{notification}',
+                'projectLocation' => 'projects/{project}/locations/{location}',
+                'projectLocationNotification' => 'projects/{project}/locations/{location}/notifications/{notification}',
                 'settings' => 'organizations/{organization}/locations/{location}/settings',
             ],
         ],
diff --git a/AdvisoryNotifications/src/V1/resources/advisory_notifications_service_rest_client_config.php b/AdvisoryNotifications/src/V1/resources/advisory_notifications_service_rest_client_config.php
index d623ce46e74b..5dfef8bb6492 100644
--- a/AdvisoryNotifications/src/V1/resources/advisory_notifications_service_rest_client_config.php
+++ b/AdvisoryNotifications/src/V1/resources/advisory_notifications_service_rest_client_config.php
@@ -6,6 +6,12 @@
             'GetNotification' => [
                 'method' => 'get',
                 'uriTemplate' => '/v1/{name=organizations/*/locations/*/notifications/*}',
+                'additionalBindings' => [
+                    [
+                        'method' => 'get',
+                        'uriTemplate' => '/v1/{name=projects/*/locations/*/notifications/*}',
+                    ],
+                ],
                 'placeholders' => [
                     'name' => [
                         'getters' => [
@@ -28,6 +34,12 @@
             'ListNotifications' => [
                 'method' => 'get',
                 'uriTemplate' => '/v1/{parent=organizations/*/locations/*}/notifications',
+                'additionalBindings' => [
+                    [
+                        'method' => 'get',
+                        'uriTemplate' => '/v1/{parent=projects/*/locations/*}/notifications',
+                    ],
+                ],
                 'placeholders' => [
                     'parent' => [
                         'getters' => [