17 U.S.C. § 1505: Registration requirement

the legal or beneficial owner of the copyright has first delivered a completed application, a deposit, and the required fee for registration of the copyright to the Copyright Office; and a registration certificate has either been issued or has not been refused. a registration certificate with respect to the work has been issued by the Copyright Office, submitted to the Copyright Claims Board, and made available to the other parties to the proceeding; and the other parties to the proceeding have been provided an opportunity to address the registration certificate; if the proceeding may not proceed further because a registration certificate for the work is pending, the proceeding shall be held in abeyance pending submission of the certificate to the Copyright Claims Board, except that, if the proceeding is held in abeyance for more than 1 year, the Copyright Claims Board may, upon providing written notice to the parties to the proceeding, and 30 days to the parties to respond to the notice, dismiss the proceeding without prejudice; and if the Copyright Claims Board receives notice that registration with respect to the work has been refused, the proceeding shall be dismissed without prejudice. In a case in which a registration certificate shows that registration with respect to a work was issued not later than 5 years after the date of the first publication of the work, the presumption under section 410(c) shall apply in a proceeding before the Copyright Claims Board, in addition to relevant principles of law under this title. In order to ensure that actions before the Copyright Claims Board proceed in a timely manner, the Register of Copyrights shall establish regulations allowing the Copyright Office to make a decision, on an expedited basis, to issue or deny copyright registration for an unregistered work that is at issue before the Board.