In the case of published works, all copies, phonorecords, and identifying material deposited are available to the Library of Congress for its collections, or for exchange or transfer to any other library. In the case of unpublished works, the Library is entitled, under regulations that the Register of Copyrights shall prescribe, to select any deposits for its collections or for transfer to the National Archives of the United States or to a Federal records center, as defined in
section 2901 of title 44.