SECTION  21 . Oath of Office for Insular and Provincial Employees . — Save in the case of a laborer or emergency employee, every person elected or appointed to an office or position of trust or profit in the Insular or provincial service, or service of a char tered city, shall, before entering upon the discharge of his duties, take and subscribe an oath of office, in such form as shall be prescribed by the Executive Secretary, wherein the affiant shall declare that he recognizes and accepts the supreme authority  of the United States of America and will maintain true faith and allegiance thereto; that he will obey the laws, legal orders, and decrees promulgated by its duly constituted authorities; that he will well and faithfully discharge to the best of his abil ity the duties of the office or position upon which he is about to enter or of any position to which he may thereafter be appointed; and that the obligation imposed by such oath of office is assumed by him voluntarily, without mental reservation or purpose of  evasion.  [82-16; 83-16; 136-7, 43, 84; 183-7; 1396-5; 1397-16.] SECTION  22 . Oath of Office of Municipal Officials . — Every person elected or appointed to a municipal or township office shall, before entering upon the discharge of his duties, take and subscribe an oath of office, in such form as shall be prescribed by t he Executive Secretary, wherein the affiant shall declare that he has the requisite qualifications to hold office in the municipality; that he recognizes and accepts the supreme authority of the United States of America and will maintain true faith and all egiance thereto; that he will obey the laws, legal orders, and decrees promulgated by its duly constituted authorities; that he will well and faithfully discharge to the best of his ability the duties of the office upon which he is about to enter or of any  position to which he may thereafter be appointed; and that the obligation imposed by such oath of office is assumed by him voluntarily, without mental reservation or purpose of evasion. [82-16 ( a, b ).] SECTION  23 . Occasions for Administration of Official Oath . — Notaries public and persons entering upon office by virtue of election shall take the oath upon the occasion of every appointment or induction into office; those entering the service by appointme nt, except notaries, shall be required to take the oath only upon the occasion of first entering upon the discharge of their duties in the particular branch of the service to which they respectively pertain; but if any such appointee should at any time be  entirely separated from the service, he shall be required to take the oath upon entering the service again.  IEHaSc SECTION  24 . By Whom Oath of Office may be Administered.  — The oath of office may be administered by any officer generally qualified to administer 7 Copyright 2012 CD Technologies Asia, Inc. and Accesslaw, Inc. Philippine Law Encyclopedia 2011