17 U.S.C. § 105 : US Code - Section 105: Subject matter of copyright: United States Government works

Search 17 U.S.C. § 105 : US Code - Section 105: Subject matter of copyright: United States Government works

Copyright protection under this title is not available for any
work of the United States Government, but the United States
Government is not precluded from receiving and holding copyrights
transferred to it by assignment, bequest, or otherwise.