In order to retain active membership in the fund, each member must: (1) Continue serving as a sheriff; (2) Pay to the secretary-treasurer membership dues of $45.00 per month. Such payment shall be due on or before the tenth day of the following month until the member has made such payments for a total of 30 years; and 567 47-16-44 (3) Comply with all other mandatory provisions of this chapter and all rules and regulations promulgated by the board. (Ga. L. 1963, p. 630, § 13; Ga. L. 1968, p. 1203, § 8; Ga. L. 1981, p. 1889, § 1; Ga. L. 1983, p. 1185, § 3; Ga. L. 1988, p. 1566, § 1; Ga. L. 1990, p. 315, § 2; Ga. L. 1994, p. 325, § 2; Ga. L. 2000, p. 1167, § 1.)