Each council, at its first regular meeting and thereafter when a vacancy occurs, shall elect from its membership a president of the council. He shall serve for a term of ONE YEAR and until his successor is elected and qualified. During such term he shall be a member of the council with the same right to speak and vote therein as any other member, but without the right of veto. He shall be recognized as the official head of the city for all ceremonial purposes, by the courts for the purpose of serving civil process, and by the governor for military purposes. In case of his absence or disability, his duties shall be performed by a president pro tempore, chosen by the council from among its own members.