Article IV of the 1987 Philippine Constitution outlines citizenship. Section 1 defines natural-born citizens as those citizens at the time of adoption, those with Filipino parents, and those born to Filipino mothers before 1973 who choose Philippine citizenship at adulthood. Section 2 defines natural-born citizens as those with citizenship from birth without needing to perform acts. Citizenship can be lost or reacquired under law. Spouses of aliens retain citizenship unless they renounce it. Dual allegiance is against national interest and will be addressed by law. There are natural-born and naturalized citizens. Laws like the Administrative Naturalization Law of 2000 and Citizenship Retention and Reacquisition Act of 2003 govern citizenship matters.