Officers to devote time to official duties.
Section 22
SEC. 22. Officers to devote time to official duties.—Each city officer, except members of the Municipal Board, shall devote his time and attention exclusively during the usual office hours to the duties of his office, and such members shall attend the regular sessions of the Board. No city officer shall hold more than one office unless expressly so provided by law. But this section shall not apply to members of the local school board, or to other persons discharging public duties under the city or the Philippine Government who receive no compensation for their services.