@abc.abstractmethod<EOL><INDENT>def update_authorization(self, authorization_form):<DEDENT>
pass<EOL>
Updates an existing authorization.

        :param authorization_form: the authorization ``Id``
        :type authorization_form: ``osid.authorization.AuthorizationForm``
        :raise: ``IllegalState`` -- ``authorization_form`` already used in an update transaction
        :raise: ``InvalidArgument`` -- one or more of the form elements is invalid
        :raise: ``NullArgument`` -- ``authorization_form`` is ``null``
        :raise: ``OperationFailed`` -- ``unable to complete request``
        :raise: ``PermissionDenied`` -- authorization failure
        :raise: ``Unsupported`` -- ``authorization_form`` did not originate from ``get_authorization_form_for_update()``

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