@abc.abstractmethod<EOL><INDENT>def register_for_changed_authorization(self, authorization_id):<DEDENT>
pass<EOL>
Registers for notification of an updated authorization.

        ``AuthorizationReceiver.changedAuthorizations()`` is invoked
        when the specified authorization in this vault is changed.

        :param authorization_id: the ``Id`` of the ``Authorization`` to monitor
        :type authorization_id: ``osid.id.Id``
        :raise: ``NullArgument`` -- ``authorization_id`` is ``null``
        :raise: ``OperationFailed`` -- unable to complete request
        :raise: ``PermissionDenied`` -- authorization failure

        *compliance: mandatory -- This method must be implemented.*