All parts of the enabling law which conflict with this part are hereby repealed; provided, however, that nothing in this part shall be construed to repeal, limit, or restrict any power heretofore granted to the board under or pursuant to the enabling law or any other existing law pertaining in any respect to the board. Notwithstanding the preceding sentence of this section, it is recognized and acknowledged that the provisions of this part pertaining to the number, terms of office, and appointment of members of the authority shall supersede and effectively repeal, when and as they become effective, those existing provisions of the enabling act that are inconsistent with the provisions of this part.