US Code
Part II— Nationality Through Naturalization
§ 1452. Certificates of citizenship or U.S. non-citizen national status; procedure

(a) Application to Attorney General for certificate of citizenship; proof; oath of allegianceA person who claims to have derived United States citizenship through the naturalization of a parent or through the naturalization or citizenship of a husband, or who is a citizen of the United States by virtue of the provisions of section 1993 of the United States Revised Statutes, or of section 1993 of the United States Revised Statutes, as amended by section 1 of the Act of May 24, 1934 (48 Stat. 797), or who is a citizen of the United States by virtue of the provisions of subsection (c), (d), (e), (g), or (i) of section 201 of the Nationality Act of 1940, as amended (54 Stat. 1138), or of the Act of May 7, 1934 (48 Stat. 667), or of paragraph (c), (d), (e), or (g) of section 1401 of this title, or under the provisions of the Act of August 4, 1937 (50 Stat. 558), or under the provisions of section 203 or 205 of the Nationality Act of 1940 (54 Stat. 1139), or under the provisions of section 1403 of this title, may apply to the Attorney General for a certificate of citizenship. Upon proof to the satisfaction of the Attorney General that the applicant is a citizen, and that the applicant’s alleged citizenship was derived as claimed, or acquired, as the case may be, and upon taking and subscribing before a member of the Service within the United States to the oath of allegiance required by this chapter of an applicant for naturalization, such individual shall be furnished by the Attorney General with a certificate of citizenship, but only if such individual is at the time within the United States.
(b) Application to Secretary of State for certificate of non-citizen national status; proof; oath of allegianceA person who claims to be a national, but not a citizen, of the United States may apply to the Secretary of State for a certificate of non-citizen national status. Upon—(1) proof to the satisfaction of the Secretary of State that the applicant is a national, but not a citizen, of the United States, and
(2) in the case of such a person born outside of the United States or its outlying possessions, taking and subscribing, before an immigration officer within the United States or its outlying possessions, to the oath of allegiance required by this chapter of a petitioner for naturalization,
the individual shall be furnished by the Secretary of State with a certificate of non-citizen national status, but only if the individual is at the time within the United States or its outlying possessions.

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