diff --git a/docs/api-guide/permissions.md b/docs/api-guide/permissions.md
index 719ac1eff..4772c5e0d 100644
--- a/docs/api-guide/permissions.md
+++ b/docs/api-guide/permissions.md
@@ -105,6 +105,21 @@ The default behaviour can also be overridden to support custom model permissions
 
 To use custom model permissions, override `DjangoModelPermissions` and set the `.perms_map` property.  Refer to the source code for details.
 
+## TokenHasReadWriteScope
+
+This permission class is intended for use with either of the `OAuthAuthentication` and `OAuth2Authentication` classes, and ties into the scoping that their backends provide.
+
+Requests with a safe methods of `GET`, `OPTIONS` or `HEAD` will be allowed if the authenticated token has read permission.
+
+Requests for `POST`, `PUT`, `PATCH` and `DELETE` will be allowed if the authenticated token has write permission.
+
+This permission class relies on the implementations of the [django-oauth-plus][django-oauth-plus] and [django-oauth2-provider][django-oauth2-provider] libraries, which both provide limited support for controlling the scope of access tokens:
+
+* `django-oauth-plus`: Tokens are associated with a `Resource` class which has a `name`, `url` and `is_readonly` properties.
+* `django-oauth2-provider`: Tokens are associated with a bitwise `scope` attribute, that defaults to providing bitwise values for `read` and/or `write`.
+
+If you require more advanced scoping for your API, such as restricting tokens to accessing a subset of functionality of your API then you will need to provide a custom permission class.  See the source of the `django-oauth-plus` or `django-oauth2-provider` package for more details on scoping token access.
+
 ---
 
 # Custom permissions
@@ -173,5 +188,7 @@ Also note that the generic views will only check the object-level permissions fo
 [throttling]: throttling.md
 [contribauth]: https://docs.djangoproject.com/en/1.0/topics/auth/#permissions
 [guardian]: https://github.com/lukaszb/django-guardian
+[django-oauth-plus]: http://code.larlet.fr/django-oauth-plus
+[django-oauth2-provider]: https://github.com/caffeinehit/django-oauth2-provider
 [2.2-announcement]: ../topics/2.2-announcement.md
 [filtering]: filtering.md