30 U.S.C. § 24 : US Code - Section 24: Proof of citizenship

Search 30 U.S.C. § 24 : US Code - Section 24: Proof of citizenship

Proof of citizenship, under sections 21, 22 to 24, 26 to 28, 29,
30, 33 to 48, 50 to 52, 71 to 76 of this title and section 661 of
title 43, may consist, in the case of an individual, of his own
affidavit thereof; in the case of an association of persons
unincorporated, of the affidavit of their authorized agent, made on
his own knowledge, or upon information and belief; and in the case
of a corporation organized under the laws of the United States, or
of any State or Territory thereof, by the filing of a certified
copy of their charter or certificate of incorporation.