Appointments to the board shall be made with staggered terms. Initial appointments shall be made as follows: one term shall expire on December 31, 1986; one term shall expire on December 31, 1987; one term shall expire on December 31, 1988; and one term shall expire on December 31, 1989. Thereafter all appointments shall be made for a term of four years and each term shall expire on December 31 of the fourth year. (Ord. 90-20 § 1, 1990: Ord. 86-20 § 1 (part), 1986).