The board of commissioners or commissioner shall be appointed by the mayor and be confirmed by the council, and the term of office of said commissioners shall be three years and until their successors are appointed and qualified. They shall file an oath of office and give bond in such amount as the governing body may by ordinance prescribe for the faithful performance of their duty, and shall be removed by the governing body for cause.

Where a board of commissioners is appointed, the term of office of the first person named shall expire in one year, the term of the second person appointed shall expire in two years, and the term of the third person appointed shall expire in three years, and thereafter one person shall be appointed each year: Provided, That where the board is composed of more than three persons, the term of office shall be for as many years as there are persons on said board, and shall be appointed in like manner.