Section 1, Article V of the 1987 Constitution to wit, "Suffrage may be exercised by all citizens of the Philippines not otherwise disqualified by law, who are at least eighteen years of age, and who shall have resided in the Philippines for at least one year, and in the place wherein they propose to vote, for at least six months immediately preceding the election. No literacy, property, or other substantive requirement shall be imposed on the exercise of suffrage."