Cal. Gov. Code § 20405.2
A member who made the election to remain under the miscellaneous or industrial retirement benefit, as provided in Section 20405.1, may elect to be subject to the state safety formula within 90 days of notification by the board. The election, which shall be provided by the board on and after January 1, 2000, shall be filed with the board. Past service that would have been credited as a safety member, but for the member's election to remain under the miscellaneous or industrial formula, shall be credited under the safety formula. This section shall apply to state employees in state bargaining units that have agreed to this provision in a memorandum of understanding, or authorized by the Director of Human Resources for classifications of state employees that are excluded from the definition of state employee by paragraph (c) of Section 3513.
Ca. Gov. Code § 20405.2