Section 2. Qualifications. —

Subject to section four of this Act, any person having the following qualifications may become a citizen of the Philippines by naturalization:

First. He must be not less than twenty-one years of age on the day of the hearing of the petition;

Third. He must be of good moral character and believes in the principles underlying the Philippine Constitution, and must have conducted himself in a proper and irreproachable manner during the entire period of his residence in the Philippines in his relation with the constituted government as well as with the community in which he is living.

Fourth. He must own real estate in the Philippines worth not less than five thousand pesos, Philippine currency, or must have some known lucrative trade, profession, or lawful occupation;

Fifth. He must be able to speak and write English or Spanish and any of the principal Philippine languages;

Sixth. He must have enrolled his minor children of school age, in any of the public schools or private schools recognized by the Office of Private Education of the Philippines, where Philippine history, government and civics are taught or prescribed as part of the school curriculum, during the entire period of the residence in the Philippines required of him prior to the hearing of his petition for naturalization as Philippine citizen.