Service of intermediate and final decisions upon parties to the proceedings is governed by Rule 2010 (service) in part 385 of this chapter. Descriptions of the Commission's organization, its methods of operation, statements of policy and interpretations, procedural and substantive rules, and amendments thereto will be filed with and published in the Federal Register. Commission opinions together with accompanying orders, Commission orders, and intermediate decisions will be released to the press and made available to the public promptly. Copies of Commission opinions, orders in the nature of opinions, rulemakings and selected procedural orders, and intermediate decisions which have become final are published in the Federal Energy Guidelines and upon payment of applicable charges, may be obtained from: Commerce Clearing House, Inc. 4025 West Peterson Avenue, Chicago, Illinois 60646. Attention: Order Department.