The provisions of this chapter extending rights to a member of a county retirement system established under this chapter by reason of his membership in the Public Employees’ Retirement System shall also apply to members who terminated state employment on or after June 30, 1971, but because of county budget problems were not employed in the permanent positions to which they would otherwise have been assigned and did not become permanent county employees until on or before January 4, 1972.

This section shall not be operative in any county until it is adopted by a majority vote of the board of supervisors.