44 USC 2107 - Acceptance of records for historical preservation

When it appears to the Archivist to be in the public interest, he may
(1) accept for deposit with the National Archives of the United States the records of a Federal agency, the Congress, the Architect of the Capitol, or the Supreme Court determined by the Archivist of the United States to have sufficient historical or other value to warrant their continued preservation by the United States Government;
(2) direct and effect the transfer to the National Archives of the United States of records of a Federal agency that have been in existence for more than thirty years and determined by the Archivist of the United States to have sufficient historical or other value to warrant their continued preservation by the United States Government, unless the head of the agency which has custody of them certified in writing to the Archivist that they must be retained in his custody for use in the conduct of the regular current business of the agency;
(3) direct and effect, with the approval of the head of the originating agency, or if the existence of the agency has been terminated, then with the approval of his successor in function, if any, the transfer of records, deposited or approved for deposit with the National Archives of the United States to public or educational institutions or associations; title to the records to remain vested in the United States unless otherwise authorized by Congress; and
(4) transfer materials from private sources authorized to be received by the Archivist by section 2111 of this title.