Notwithstanding any other provision of law, and with respect only to an election by a contracting agency to amend its contract to become subject to Section 21369, 21370, or 21363, instead of Section 21366, the following shall apply:
(a)
Members who are on the amending agency’s active payroll on the effective date of the contract amendment shall elect in writing, within 90 days after the notification by the board of the amendment, to be subject to Section 21363, 21366, or 21370, as applicable, or Section
21369 with respect to all safety service performed for the contracting agency.
(b)
Members on the effective date who are former employees of the amending agency and whose service for the amending agency was subject to Section 21366 or Section 21369, shall retain their rights under the formula in effect at the time their service was credited.
(c)
Former members who upon reentry into state service elect to redeposit contributions, shall be subject to Section 21363, 21369, or 21370, as applicable, with respect to all safety service performed for the amending agency prior to the effective date of the contract amendment.
(d)
Notwithstanding Section 21357, a former member who reinstates to the amending agency as a local safety member shall elect within 90 days of the reinstatement whether to be subject to Section 21363,
21369, or 21370, as applicable, or Section 21366 with respect to all service with that contracting agency prior to the effective date of the contract amendment. The election shall be effective only if the reinstated member remains in the employment for at least one year subsequent to reinstatement.