Cal. Gov. Code § 21373
The combined current and prior service pensions for a state safety member who on March 31, 1973, was a law enforcement member not subject to Section 21369, shall be determined in accordance with this part as it read and applied to him or her on March 31, 1973, rather than Section 21369 if under those provisions he or she is entitled to a retirement allowance exceeding 2 percent of final compensation per year of his or her law enforcement service, unless he or she elects in writing to be subject to Section 21369 and the election is filed in the office of the board within 30 calendar days following April 1, 1973. Any member who does not so elect and thereafter accepts appointment to a position in another state department in which he or she is a state safety member shall become subject, upon that acceptance, to Section 21369 or 21369.1, as applicable, with respect to all of his or her state safety service.
Ca. Gov. Code § 21373