In a recent decision (Calilung v. Datumanong, G.R. No. 160869, May 11, 2007), the Supreme Court upheld the constitutionality of RA No. 9225 or the Dual Citizenship Law declaring -
From the above excerpts of the legislative record, it is clear that the intent of the legislature in drafting Rep. Act No. 9225 is to do away with the provision in Commonwealth Act No. 63[5] which takes away Philippine citizenship from natural-born Filipinos who become naturalized citizens of other countries. What Rep. Act No. 9225 does is allow dual citizenship to natural-born Filipino citizens who have lost Philippine citizenship by reason of their naturalization as citizens of a foreign country. On its face, it does not recognize dual allegiance. By swearing to the supreme authority of the Republic, the person implicitly renounces his foreign citizenship. Plainly, from Section 3, Rep. Act No. 9225 stayed clear out of the problem of dual allegiance and shifted the burden of confronting the issue of whether or not there is dual allegiance to the concerned foreign country. What happens to the other citizenship was not made a concern of Rep. Act No. 9225.