44 U.S.C. § 2117 : US Code - Section 2117: Limitation on liability

Search 44 U.S.C. § 2117 : US Code - Section 2117: Limitation on liability

When letters and other intellectual productions (exclusive of
patented material, published works under copyright protection, and
unpublished works for which copyright registration has been made)
come into the custody or possession of the Archivist, the United
States or its agents are not liable for infringement of copyright
or analogous rights arising out of use of the materials for
display, inspection, research, reproduction, or other purposes.