8 U.S.C. § 1156 : US Code - Section 1156: Unused immigrant visas

Search 8 U.S.C. § 1156 : US Code - Section 1156: Unused immigrant visas

If an immigrant having an immigrant visa is denied admission to
the United States and removed, or does not apply for admission
before the expiration of the validity of his visa, or if an alien
having an immigrant visa issued to him as a preference immigrant is
found not to be a preference immigrant, an immigrant visa or a
preference immigrant visa, as the case may be, may be issued in
lieu thereof to another qualified alien.