On October 1, 1975, all employees and future employees in the fire and police service shall be members of the Firemen’s and Policemen’s Pension and Relief Fund and afforded all the benefits thereof.

(Acts 1947, No. 13, p. 7, § 28; Acts 1967, No. 602, p. 1390, § 6; Acts 1975, No. 438, p. 1049, § 5.)