SECTION 1. Section 21 of the Revised Administrative Code is hereby amended to read as follows:
"SEC. 21. Officials authorized to administer oath. — The following officers have general authority to administer oaths, to wit:
"President; Vice-President; Members and Secretaries of both Houses of the Congress; Members of the Judiciary; Secretaries of Departments; provincial governors and lieutenant-governors; city mayors; municipal mayors; bureau directors; regional directors; clerks of courts; registrars of deeds; and other civilian officers in the Philippine public service whose appointments are vested in the President of the Philippines and are subject to confirmation by the Commission on Appointments; all other constitutional officers; and notaries public. A person who by authority of law shall serve in the capacity of the officers mentioned above shall possess the same power."