@abc.abstractmethod<EOL><INDENT>def get_authorizations_by_genus_type(self, authorization_genus_type):<DEDENT>
return<EOL>
Gets an ``AuthorizationList`` corresponding to the given authorization genus ``Type`` which does not include authorizations of genus types derived from the specified ``Type``.

        In plenary mode, the returned list contains all known
        authorizations or an error results. Otherwise, the returned list
        may contain only those authorizations that are accessible
        through this session.

        :param authorization_genus_type: an authorization genus type
        :type authorization_genus_type: ``osid.type.Type``
        :return: the returned ``Authorization`` list
        :rtype: ``osid.authorization.AuthorizationList``
        :raise: ``NullArgument`` -- ``authorization_genus_type`` is ``null``
        :raise: ``OperationFailed`` -- unable to complete request
        :raise: ``PermissionDenied`` -- authorization failure occurred

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