(b) The Basic Safety Plan shall provide a pension at retirement for service equal to the percentage of the member’s final compensation set forth opposite the member’s age at retirement, taken to the preceding quarter year, in the following table, multiplied by the number of years of service in the system as a safety member.

(c) The Safety Option Plan One shall provide a pension at retirement for service equal to the percentage of the member’s final compensation set forth opposite the member’s age at retirement, taken to the preceding quarter year, in the following table, multiplied by the number of years of service in the system as a safety member.

(d) The Safety Option Plan Two shall provide a pension at retirement for service equal to the percentage of the member’s final compensation set forth opposite the member’s age at retirement, taken to the preceding quarter year, in the following table, multiplied by the number of years of service in the system as a safety member.

(f) On and after January 1, 2013, an employer and its employees subject to Safety Option Plan One or Safety Option Plan Two may agree in a memorandum of understanding to be subject to Safety Option Plan One or the Basic Safety Plan, subject to the following:

1. (1) The lower plan shall apply to members first employed on or after the effective date of the lower plan, and shall be agreed to in a memorandum of understanding that has been collectively bargained in accordance with applicable laws.
2. (2) A retirement plan contract amendment with a public retirement system to alter a retirement formula pursuant to this subdivision shall not be implemented by the employer in the absence of a memorandum of understanding that has been collectively bargained in accordance with applicable laws.
3. (3) An employer shall not use impasse procedures to impose the lower plan.
4. (4) An employer shall not provide a different defined benefit for nonrepresented, managerial, or supervisory employees than the employer provides for other public employees, including represented employees, of the same employer who are in the same membership classifications.