((a)) ** .—** Subject to section 1507(b), a district court of the United States shall issue a stay of proceedings or such other relief as the court determines appropriate with respect to any claim brought before the court that is already the subject of a pending or active proceeding before the Copyright Claims Board.

((b)) ** .—** A proceeding before the Copyright Claims Board under this chapter shall qualify as an alternative dispute resolution process under for purposes of referral of eligible cases by district courts of the United States upon the consent of the parties.