Ala. Code § 11-40-18
In all Class 1 municipalities, notwithstanding any provision of law to the contrary, any benefit payable on a monthly basis to a participant or retiree under the Policemen's Pension and Relief Plan provided by Act No. 502 of the 1923 Session of the legislature of Alabama, as amended or codified; the Firemen's Pension and Relief Plan provided by Act No. 307 of the 1943 Session of the legislature of Alabama, as amended (General Acts of Alabama of 1943, p. 264); the Limited Policemen's Retirement and Relief System provided by Act No. 470 of the 1955 Regular Session of the legislature of Alabama, as amended (Acts of Alabama of 1955, p. 1067); and Limited Firemen's Pension and Relief System provided by Act No. 217 of the 1966 Special Session of the legislature of Alabama, as amended (Acts of Alabama, Special Session 1966, p. 280) shall not be of an amount less than $400.00 per month, and any survivor's or spouse's benefit payable on a monthly basis shall not be of an amount less than $160.00 per month.
Ala. Code § 11-40-18 (1975)