Members of the Planning and Zoning Commission in office at the time of the adoption of Ordinance No. _____ of the City shall, subject to the laws and ordinances applicable to such members, continue to serve as Commission members until the expiration of their present terms of office, or until their successors have been duly appointed. Upon the completion of such members’ terms, members of the Planning and Zoning Commission shall be appointed as follows: four (4) members shall be appointed as follows: four (4) members shall be appointed to each serve a two (2) year term and three (3) members shall be appointed to each serve a one (1) year term; upon the completion of the said one (1) year term, three (3) members shall be appointed to serve a term of two (2) years; thereafter, all members of the Planning and Zoning Commission shall serve a term of two (2) years. Vacancies of regular and alternate membership on the Planning and Zoning Commission shall be filled for the unexpired terms of office, by the governing body of the city. Alternate members may be considered for vacancies of regular membership on the Planning and Zoning Commission.