@abc.abstractmethod<EOL><INDENT>def set_based_on_grades(self, grades):<DEDENT>
pass<EOL>
Sets the grade-based designation.

        :param grades: the grade-based designation
        :type grades: ``boolean``
        :raise: ``InvalidArgument`` -- ``grades`` is invalid
        :raise: ``NoAccess`` -- ``grades`` cannot be modified

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