A total of eight members shall be appointed by the Mayors of the respective municipal constituents, each of said members to be a resident of the municipality by which he/she is appointed. The number of members to be appointed from each municipality shall be based on the proportionate amount of shoreline located in such municipality, as follows: Byram: one (i) member; Netcong: two members; Roxbury: two members; and Stanhope: three members. The first member appointed by each municipal constituent shall serve for an initial term of four years; the second and third members appointed by each municipal constituent, if applicable, shall serve for initial terms of two years. Upon the expiration of the initial terms of membership of all members, all terms thereafter shall be for a period of four years.