Does Rails come with a "not authorized" exception?

I am writing an application that uses plain old Ruby objects (POROs) to abstract authorization logic out of controllers.

Currently, I have a custom exception class called NotAuthorized that I rescue_from at the controller level, but I was curious to know: Does Rails 4 already come with an exception to indicate that an action was not authorized? Am I reinventing the wheel by implementing this exception?

Clarification: The raise AuthorizationException is not happening anywhere inside of a controller, it is happening inside of a completely decoupled PORO outside of the controller. The object has no knowledge of HTTP, routes or controllers.