The Secretary shall provide technical assistance on a nonreimbursable basis to counties for the development of land use ordinances prescribed by sections
544e and
544f of this title: Provided, That in the event a county fails to obtain approval by the Commission for a land use ordinance within three years after the date technical assistance is first provided under this subsection for the development of a land use ordinance, the Secretary shall terminate all technical assistance for any participation in the development of such ordinance.