Beginning July 1, 1996, the first members of the commission shall be appointed by the governor for terms of one (1) to three (3) years each as follows: at-large member, one (1) year; southern district member, two (2) years; northern district member, three (3) years. At the expiration of their original terms, commission members shall be appointed for a term of three (3) years. No member shall serve more than two (2) consecutive full terms. Each member shall hold office until his successor is appointed and qualified. Appointments to fill vacancies shall be for the balance of the unexpired term.