Pursuant to Article IV of the 1935 Constitution, the National Assembly of the Philippines passed Commonwealth Act No.
Under Section 14 of the Law, prior to the issuance of a certificate of naturalization, the person petitioning to be granted Filipino citizenship had to recite the following oath in open court: I, (name), solemnly swear that I renounce absolutely and forever all allegiance and fidelity to any foreign prince, potentate, state or sovereignty, and particularly to the (country of citizenship), of which at this time I am a subject or citizen; that I will support and defend the Constitution of the Philippines and that I will obey the laws, legal orders and decrees promulgated by the duly constituted authorities of the Commonwealth of the Philippines; and I hereby declare that I recognize and accept the supreme authority of the United States of America in the Philippines and will maintain true faith and allegiance thereto; and that I impose this obligation upon myself voluntarily without mental reservation or purpose of evasion.
[1] With the independence of the Philippines on July 4, 1946, the oath was modified to remove references to the Commonwealth and the United States, although the language remained virtually the same as the original.
I, (name), solemnly swear that I renounce absolutely and forever all allegiance and fidelity to any foreign prince, potentate, state or sovereignty, and particularly to the (country of citizenship), of which at this time I am a subject; that I will support and defend the Constitution of the Philippines and that I will obey the laws, legal orders and decrees promulgated by the duly constituted authorities of the Republic of the Philippines; and I hereby declare that I recognize and accept the supreme authority of the Republic of the Philippines and will maintain true faith and allegiance thereto; and that I impose this obligation upon myself voluntarily without mental reservation or purpose of evasion.
[2]Instead of the oath, a petitioner may choose to recite an affirmation of allegiance instead if religious or personal reasons so require.