Cal. Government Code § 31510

(a) This article shall be applicable to all members of the retirement system of any county of the first class, as defined by Section 28020, as amended by Chapter 1204 of the Statutes of 1971, and Section 28022, as amended by Chapter 43 of the Statutes of 1961. (b) The purpose of this article is to provide a defined contribution plan which, in conjunction with retirement benefit provisions otherwise contained in this chapter, will provide approximately the same level of retirement benefits to persons who first become members on or after January 1, 1990, and are subject to the limitations set forth in Section 415 of the Internal Revenue Code of 1986, as they would receive under the other retirement benefit provisions in the absence of those limitations, while not affecting the rate of either member or employer contributions to the retirement system. In addition, it is intended that subdivisions (c) and (d) constitute an election under Section 415(b)(10)(C) of the Internal Revenue Code of 1986 with respect to all retirement plans within the retirement system. (c) Notwithstanding any other provision of this part, the benefits payable to any person who first becomes a member on or after January 1, 1990, shall be subject to the limitations set forth in Section 415 of the Internal Revenue Code of 1986, as adjusted pursuant to Section 415(d)(1)(A) and (B). (d) Notwithstanding any other law, the benefits payable to any person who first became a member prior to January 1, 1990, shall not be subject to the limitations set forth in Section 415(b) of the Internal Revenue Code of 1986, except to the extent required by subsection (b)(10)(A) of Section 415. (e) The election described in subdivision (b) shall apply to all employers whose employees are members of the retirement system of the county on December 31, 1989. (f) The retirement benefits of all persons who first become members of the retirement system on or after January 1, 1990, and participate in Safety Plan B or General Plan D shall be governed by this chapter applicable to those plans and by this article. (g) Subdivisions (c) and (d) shall not become operative until the board of supervisors has taken the actions required by subdivision (a) of Section 31510.2. (h) In the event of a conflict, this article shall supersede and prevail over other provisions or application of provisions otherwise contained in this chapter.