@abc.abstractmethod<EOL><INDENT>def get_assignable_vault_ids_for_qualifier(self, vault_id, qualifier_id):<DEDENT>
return<EOL>
Gets a list of vault including and under the given vault node in which a specific qualifier can be assigned.

        :param vault_id: the ``Id`` of the ``Vault``
        :type vault_id: ``osid.id.Id``
        :param qualifier_id: the ``Id`` of the ``Qualifier``
        :type qualifier_id: ``osid.id.Id``
        :return: list of assignable vault ``Ids``
        :rtype: ``osid.id.IdList``
        :raise: ``NullArgument`` -- ``vault_id`` or ``qualifier_id`` is ``null``
        :raise: ``OperationFailed`` -- unable to complete request

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