Who are considered natural-born Filipinos?

Natural-born Filipinos are citizens of the Philippines from birth without having to perform any act to acquire or perfect their Philippine citizenship. Those whose fathers or mothers are citizens of the Philippines at the time of their birth and those born before 17 January 1973, of Filipino mothers, who elect Philippine citizenship upon reaching the age of majority are considered natural-born Filipinos.

Philippine citizenship law derives from the principle of jus sanguinis or the citizenship of the parents.