Candidates shall not be nominated to succeed any particular commissioner; but if only one commissioner is removed at such election, the candidate at such election receiving the highest number of votes shall be declared elected to fill the vacancy; and if more than one commissioner is removed at such election, such candidates equal in number to the number of commissioners removed shall be declared elected to fill the vacancies; and among the successful candidates, those receiving the greater number of votes shall be declared elected for the longer terms. Cases of ties, and all other matters not herein specially provided for, shall be determined by the rules governing elections generally.