G.R. No. L-18775 November 30, 1963
LO SAN TUANG, petitioner-appellant, vs. EMILIO L. GALANG, as Commissioner of Immigration, respondent-appellee.

FACTS

Petitioner Lo San Tuang, a citizen of Nationalist China, entered the Philippines as a temporary visitor on July 1, 1960, with authority to stay until June 30, 1961. She did not depart upon the expiration of her authorized stay. Instead, she requested the Commissioner of Immigration to cancel her alien certificate of registration. Her claim was that she had acquired Philippine citizenship by operation of law, following the admission of her husband, Ngo Seng alias Fong Seng Shwan, to Philippine citizenship on January 7, 1961. The Commissioner of Immigration denied her request.
Consequently, Lo San Tuang filed a petition for Prohibition and Mandamus in the Court of First Instance of Manila. She submitted, among other documents, a joint affidavit with her husband stating she was not disqualified from becoming a Philippine citizen. The trial court dismissed her petition, ruling that under Section 15 of the Revised Naturalization Law ( Commonwealth Act No. 473 ), an alien woman claiming citizenship through marriage must prove she possesses all qualifications and none of the disqualifications for naturalization. The court found she had not even proven the absence of disqualifications. Petitioner appealed this decision to the Supreme Court.

ISSUE

The core issue is the correct interpretation of the phrase “who might herself be lawfully naturalized” in Section 15 of the Revised Naturalization Law. Does it require the alien wife to prove she has all the qualifications and none of the disqualifications prescribed for naturalization, or does it merely require her to prove she is not laboring under any of the statutory disqualifications?

RULING

The Supreme Court affirmed the dismissal of the petition, ruling against the petitioner. The Court held that the phrase “who might herself be lawfully naturalized” necessitates that the alien woman must prove she has all the qualifications prescribed in Section 2 and none of the disqualifications enumerated in Section 4 of Commonwealth Act No. 473 . The legal logic is anchored on a consistent line of jurisprudence. The Court cited Ly Giok Ha v. Galang, which explicitly held that the statutory limitation excludes from the benefits of naturalization by marriage those disqualified under Section 4. This interpretation was reiterated in Cua v. Board of Immigration Commissioners and Lee Suan Ay v. Galang, the latter stating the wife “must possess the qualifications required by law to become a Filipino citizen by naturalization.”
The Court rejected the petitioner’s reliance on the American case of Leonard v. Grant, which suggested a more lenient presumption of qualifications for a wife. It distinguished the old Philippine Naturalization Law (Act No. 2927), which had specific racial classifications for who “may become” a citizen, from the Revised Naturalization Law ( C.A. No. 473 ). The latter eliminated such racial bars, focusing instead on universal qualifications and disqualifications. Consequently, for an alien wife to be deemed a citizen under Section 15, she must affirmatively establish compliance with all positive qualifications and the absence of all negative disqualifications. Since Lo San Tuang failed to prove she possessed all these requisites, her claim to derivative citizenship was properly denied.