a. Notwithstanding the provisions of any section of law to the contrary, the board of education of a regional district and the board or boards of education of one or more local districts determined to enlarge the regional school district may by resolution frame and adopt a proposal to calculate and apportion the membership of the enlarged board of education other than in accordance with the provisions of N.J.S. 18A:13-8 and N.J.S. 18A:13-36. If the commissioner approves the alternative apportionment, then that alternative apportionment shall be included in the consultation, study, and investigation conducted pursuant to N.J.S. 18A:13-43 to determine whether it is advisable to enlarge the regional school district to include the local district or districts therein. If the commissioner or his representative determines that it is advisable to enlarge the regional school district to include the local district or districts therein, and the question of whether or not the proposal to enlarge the regional district is submitted to the voters pursuant to N.J.S. 18A:13-43, and the proposal is adopted by the voters pursuant to N.J.S. 18A:13-44, then the members of the enlarged board of education of the regional district shall be elected in accordance with the alternate apportionment. For an enlarged regional district with a board of education apportioned pursuant to this section, the executive county superintendent of the county in which any new constituent district of an enlarged regional district is situate shall, not later than 30 days after the election for the enlargement thereof, appoint one member of the enlarged board of education of the regional district from among the qualified citizens of each new constituent district, and the members so appointed shall serve until the first Monday succeeding the first annual April school election of the enlarged regional district. In the case of a regional district in which the annual school election is in November, the members so appointed shall serve until the first week in January next succeeding the first annual November school election of the enlarged regional district.