The claimant, Stanley C. T~, filed for child's insurance benefits on November 28,
                  1980, as the child of the wage earner, Carlos A. T~. Carlos is domiciled on Guam.
                  Stanley C. T~ was born on Saipan in the Northern Mariana Islands on October 5, 1963.
                  Stanley's father, Estanislao T. T~, is. the son of the wage earner. Statements in
                  the claims file indicate that when all of the parties were domiciled in Saipan, Stanley
                  was given to the wage earner (Carlos) and his wife by Estanislao and his wife; Stanley
                  was either one month or one year old at the time. There was no written agreement regarding
                  adoption of Stanley. The parties have made conflicting statements about an oral adoption
                  agreement. Both Carlos and Estanislao agree, however, that giving Stanley to his paternal
                  grandparents was in accordance with the custom of the Chamorro people, whereby grandparents
                  may adopt a grandchild and raise him/her as their own. Statements from Carlos and
                  Estanislao indicate that Carlos has treated Stanley as his own child and has had full
                  responsibility for his support and parental supervision. [1] Carlos, his wife and Stanley moved to Guam in 1968. You have indicated that Carlos
                  has never initiated legal adoption proceedings on Guam. [2] You inquired whether Guam would recognize the customary adoption in the Northern
                  Mariana Islands in determining Stanley's right to inherit the wage earner's intestate
                  personal property.
               
               We sought the assistance of the Law Library of Congress in determining whether such
                  a customary adoption would be recognized in the Northern Mariana Islands. An attorney
                  there informed us that the Northern Mariana Islands adopted a constitution which became
                  effective in 1978. Under this constitution, the Northern Marianas are basically self-governing
                  but the laws of the Trust Territory of the Pacific (of which the Northern Marianas
                  were a part until 1978) -remain in force wherever they are not inconsistent with the
                  Northern Marianas' constitution and have not been amended by local statute.
               
               To date, no statutes concerning family law or other "private law" matters have been
                  adopted by the Northern Marianas' legislature. The Trust Territory Code would therefore
                  apply to this case (at the time of the customary adoption (before the Northern Marianas'
                  independence) and at the time of the claimant's 1980 application). Sections 4 and
                  5 of Title 39 of the Trust Territory Code [3] provide for the recognition and confirmation of adoptions effected in accordance
                  with local custom. Whether a customary adoption of Stanley T~ by Carlos T~ took place
                  in the Northern Marianas is a factual issue for you to decide.[4] If a valid customary adoption occurred, it would be considered valid under the Northern
                  Marianas' law.
               
               Assuming you find that a valid customary adoption of Stanley by Carlos and his wife
                  took place on Saipan, the next issue to be addressed is whether Guam would recognize
                  this customary adoption. The laws of the territory of Guam do not contain any provisions
                  regarding the recognition of foreign adoptions. Although no foreign (e.g., U.S.) law
                  has been incorporated to govern those areas where the territorial law is silent, we
                  believe that the courts of Guam would employ the principle of comity[5] to accord validity to an adoption effectuated in compliance with the laws of a foreign
                  jurisdiction, [6] in the absence of any public policy ground for refusing such recognition. We believe
                  that Guam courts would find no public policy ground for refusing recognition of a
                  customary adoption valid under Northern Mariana law. [7]
               To determine whether the claimant may be treated as the adopted child of the wage
                  earner under subsections 216(e) and 216(h) (2) of the Social Security Act (for purposes
                  of entitlement to child's insurance benefits under subsection 202(d)), the law of
                  Guam,' the wage earner's domicile at the time the application was filed, must be applied.
                  As the analysis above indicated, we conclude that Guam, under the principle of comity,
                  would recognize a valid customary adoption which took place in the Northern Mariana
                  Islands. Section 257 of the Guam Probate Code provides that an adopted child succeeds
                  to the estate of one who has adopted him or her, to the same extent as a natural child.
                  Assuming you find a valid customary adoption took place in the Northern Mariana Islands,
                  Stanley would, therefore, qualify as the wage earner's "child" under section 216(e)
                  of the' Act.