@abc.abstractmethod<EOL><INDENT>def get_applied_assessment_parts(self):<DEDENT>
return<EOL>
Qualifies ``is_cumulative()`` to apply to a specific list of assessment parts.

        If ``is_cumulative()`` is ``true,`` this method may return an
        empty list to mean all previous assessment parts.

        :return: list of assessment parts
        :rtype: ``osid.assessment.authoring.AssessmentPartList``
        :raise: ``IllegalState`` -- ``is_cumulative()`` is ``false``
        :raise: ``OperationFailed`` -- unable to complete request

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