(2) If the provisions of the Act of October 20, 1976, P.L. 94-566 (26 U.S.C. 3306) requiring benefit coverage for service performed in agricultural labor as provided in ORS 657.045 (1)(a) and (b) and (7) and 657.105 (2) become inoperative by Act of Congress or by decision of the United States Supreme Court, payments of contributions and payment of benefits pursuant to the statutes cited in this subsection shall cease. [Amended by 1977 c.446 §9]