@abc.abstractmethod<EOL><INDENT>def set_authority(self, authority):<DEDENT>
pass<EOL>
Sets the authority.

        :param authority: the authority
        :type authority: ``string``
        :raise: ``InvalidArgument`` -- ``authority`` is invalid
        :raise: ``NoAccess`` -- ``authority`` cannot be modified
        :raise: ``NullArgument`` -- ``authority`` is ``null``

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