The voters in every county and city shall elect a treasurer unless otherwise provided by general law or special act. The treasurer shall exercise all the powers conferred and perform all the duties imposed upon treasurers by law. He may perform such other duties, not inconsistent with his office, as the governing body may request. The treasurer shall pay from the funds of the local government all properly authorized accounts submitted to him for payment. He shall be elected as provided by general law for a term of four years.