@abc.abstractmethod<EOL><INDENT>def register_for_new_activities_for_objective(self, objective_id):<DEDENT>
pass<EOL>
Register for notifications of new activities for the given objective.

        ``ActivityReceiver.newActivities()`` is invoked when a new
        activity is created.

        :param objective_id: the ``Id`` of the ``Activity`` to monitor
        :type objective_id: ``osid.id.Id``
        :raise: ``NullArgument`` -- ``objective_id is null``
        :raise: ``OperationFailed`` -- unable to complete request
        :raise: ``PermissionDenied`` -- authorization failure

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