This subchapter governs procedures applicable to proceedings before the Copyright Royalty Judges in making determinations and adjustments pursuant to 17 U.S.C. 115(d) and 801(b). The procedures set forth in part 355 of this subchapter shall govern administrative assessment proceedings pursuant to 17 U.S.C. 115(d) and 801(b)(8), and the procedures set forth in parts 351 through 354 of this subchapter shall govern all other proceedings pursuant to 17 U.S.C. 801(b).