Administrative Code of 1987

Section 40

All public officers and employees of the government including every member of the armed forces shall, before entering upon the discharge of his duties, take an oath or affirmation to uphold and defend the Constitution; that he will bear true faith and allegiance to it; obey the laws, legal orders and decrees promulgated by the duly constituted authorities; will well and faithfully discharge to the best of his ability the duties of the office or position upon which he is about to enter; and that he voluntarily assumes the obligation imposed by his oath of office, without mental reservation or purpose of evasion. Copies of the oath shall be deposited with the Civil Service Commission and the National Archives.

Section 41

The following officers have general authority to administer oaths: President; Vice President, Members and Secretaries of both Houses of Congress; Members of the Judiciary; Secretaries of Departments; provincial governors and lieutenant-governors; city mayors; municipal mayors; bureau directors; regional directors; clerks of court; registrars of deeds; other civilian officers in the public service of the government of the Philippines whose appointments are vested in the President and are subject to confirmation by the Commission on Appointments; all other constitutional officers; PAO lawyers in connection with the performance of duty; and notaries public. (as amended by Republic Act No. 6733, [July 25, 1989] and Republic Act No. 9406, [March 23, 2007])

Section 42

Officers authorized to administer oaths, with the exception of notaries public, municipal judges and clerks of court, are not obliged to administer oaths or execute certificates save in matters of official business or in relation to their functions as such; and with the exception of notaries public, the officer performing the service in those matters shall charge no fee, unless specifically authorized by law. (as amended by Republic Act No. 9406, [March 23, 2007])