Section 21
SEC. 21. Nature of office.-The Mayor shall be the chief executive of the city and as such shall have immediate control over the executive functions of the different departments and agencies of the city, subject to the general supervision of the President as may be provided for by law. The City Board may, in its discretion, provide quarters for the Mayor or commute the privilege of using the same in addition to his salary provided that quarter allowance when commuted shall not exceed twenty-four hundred pesos per annum. He shall be entitled to other non-commutable allowances not to exceed five thousand Pesos per annum.