@abc.abstractmethod<EOL><INDENT>def create_time_period(self, time_period_form):<DEDENT>
return<EOL>
Creates a new ``TimePeriod``.

        :param time_period_form: the forms for this ``TimePeriod``
        :type time_period_form: ``osid.calendaring.TimePeriodForm``
        :return: the new ``TimePeriod``
        :rtype: ``osid.calendaring.TimePeriod``
        :raise: ``IllegalState`` -- ``time_period_form`` already used in a create transaction
        :raise: ``InvalidArgument`` -- one or more of the form elements is invalid
        :raise: ``NullArgument`` -- ``time_period_form`` is ``null``
        :raise: ``OperationFailed`` -- unable to complete request
        :raise: ``PermissionDenied`` -- authorization failure
        :raise: ``Unsupported`` -- ``time_period_form`` did not originate from ``get_time_period_for_create()``

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