Section 21090 - Establishment of two tier retirement system authorized(a) The governing body of a contracting agency may establish a two-tiered retirement system developed by the board.(b) It is the intent of the Legislature to make a two-tiered retirement system a matter for bargaining pursuant to provisions of law relating to employer-employee relations.Amended by Stats. 1996, Ch. 906, Sec. 133. Effective January 1, 1997.