@abc.abstractmethod<EOL><INDENT>def register_for_changed_assessments(self):<DEDENT>
pass<EOL>
Registers for notification of updated assessments.

        ``AssessmentReceiver.changedAssessments()`` is invoked when an
        assessment in this assessment bank is changed.

        :raise: ``OperationFailed`` -- unable to complete request
        :raise: ``PermissionDenied`` -- authorization failure occurred

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