Cal. Gov. Code § 50871.5

Notwithstanding any other provision of this chapter, if all members defined by Section 50804 or Section 50805 or both Sections 50804 and 50805 agree in writing thereto, the governing body of a local agency may, by resolution, provide to those members, in lieu of the benefits provided under this chapter, retirement benefits which are comparable to those provided by the Public Employees’ Retirement Law to local safety members. The change in benefits authorized by this section shall not be construed as a violation of Section 50882 or 50883.