Nomination and voting for full number of board members to be elected authorized

Notwithstanding the provisions of sections 9-204 and 9-414 and of any special act or town charter, any town may, by charter, or by referendum vote taken at any regular election in such town pursuant to either a vote of its legislative body or a petition signed by at least five per cent of the electors of such town as established by the last-preceding registry list of such town, authorize the nomination by any political party of candidates for election as members of the board of education of such town equal to the number of members of said board to be elected at such election, and authorize the electors of such town to vote for the full number of such members to be elected, provided not more than one-half of the members of said board declared elected to the same term at such election shall be of the same political party if the number to be elected is even and not more than a bare majority thereof shall be members of the same political party if the number to be elected is odd. If the number of candidates, sufficient to fill the offices voted on, receiving the highest number of votes at any such election are of the same political party, those persons sufficient to fill one-half or a bare majority of such offices, as the case may be, who received the highest number of votes among such candidates shall be declared elected and those persons receiving the next highest number of votes who do not belong to such political party, sufficient in number to fill the remaining offices, shall be declared elected.