Article 48 – 51 of the Civil Code of the Philippines *Amended by Article IV, Section 1 of the 1987 Constitution.

1. Title II. –
CITIZENSHIP* AND
DOMICILE
ARTICLE 48 – 51 OF THE CIVIL CODE OF THE PHILIPPINES
*AMENDED BY ARTICLE IV, SECTION 1 OF THE 1987 CONSTITUTION.

2.  Art. 48. The following are citizens of the Philippines:
 (1) Those who were citizens of the Philippines at the
time of the adoption of the Constitution of the
Philippines;
 (2) Those born in the Philippines of foreign parents
who, before the adoption of said Constitution, had
been elected to public office in the Philippines;

3.  (3) Those whose fathers are citizens of the Philippines;
 (4) Those whose mothers are citizens of the Philippines
and, upon reaching the age of majority, elect Philippine
citizenship;
 (5) Those who are naturalized in accordance with law.

4.  Art. 49. Naturalization and the loss and reacquisition of
citizenship of the Philippines are governed by special
laws.
 Art. 50. For the exercise of civil rights and the fulfillment
of civil obligations, the domicile of natural persons is
the place of their habitual residence.

5.  Art. 51. When the law creating or recognizing them, or
any other provision does not fix the domicile of juridical
persons, the same shall be understood to be the place
where their legal representation is established or where
they exercise their principal functions.