Section 1Sec./Art. 1

How citizenship may be lost.-A Filipino citizen may lose his citizenship in any of the following ways and/or events:

1. By naturalization in a foreign country;

2. By express renunciation of citizenship;

3. By subscribing to an oath of allegiance to support the constitution or laws of a foreign country upon attaining twenty-one years of age or more;

4. By accepting commission in the military, naval or air service of a foreign country;

5. By cancellation of the certificate of naturalization;

6. By having been declared, by competent authority, a deserter of the Philippine army, navy or air corps in time of war, unless subsequently a plenary pardon or amnesty has been granted; and

7. In the case of a woman, upon her marriage to a foreigner if, by virtue of the law in force in her husband's country, she acquires his nationality.