Who are Philippine citizens under the present Constitution?
The 1987 Constitution, Article IV, Section 1 provides:
Section 1. The following are citizens of the Philippines
Those who are citizens of the Philippines at the time of the adoption of this Constitution;
Those whose fathers or mothers are citizens of the Philippines;
Those born before January 17, 1973, of Filipino mothers, who elect Philippine citizenship upon reaching the age of majority; and
Those who are naturalized in accordance of law.
source: Bureau of Immigration