The 1935 Constitution of the Philippines

Section 1

The following are citizens of the Philippines: (1) Those who are citizens of the Philippine Islands at the time of the adoption of this Constitution. (2) Those born in the Philippine Islands of foreign parents who, before the adoption of this Constitution, had been elected to public office in the Philippine Islands. (3) Those whose fathers are citizens of the Philippines. (4) Those whose mothers are citizens of the Philippines and, upon reaching the age of majority, elect Philippine citizenship. (5) Those who are naturalized in accordance with law.

Section 2

Philippine citizenship may be lost or reacquired in the manner provided by law.