Citizenship in the Philippines is defined in the 1987 Constitution. Citizens include those who were citizens when the Constitution was adopted, those with Filipino parents, those born to Filipino mothers before 1973, and those who are naturalized. Citizenship can be lost or acquired through legal means. Citizens have both rights and duties, including the right to vote and the duty to pay taxes. Duties involve actively participating in civic and political processes, volunteering, and upholding the national motto of being God-fearing, humane, environmentally-conscious and patriotic.