The provisions of this article extending rights to a member of a county retirement system established under this chapter or subjecting him to any limitation, by reason of his membership in the Public Employees’ Retirement System, shall apply in like manner and under like conditions to said member by reason of his membership in any retirement system maintained by the Regents of the University of California, provided said member enters any retirement system maintained by said regents pursuant to an agreement made on or after January 1, 1965, between said regents and a county making provision for the operation by said regents of all or any part of the hospital facilities of that county or the transfer of title to such a hospital to the regents and for reciprocal university retirement system rights and limitations substantially comparable to those prescribed by this article.