[Code of Federal Regulations] [Title 14, Volume 4] [Revised as of January 1, 2006] From the U.S. Government Printing Office via GPO Access [CITE: 14CFR221.31] [Page 63] TITLE 14--AERONAUTICS AND SPACE CHAPTER II--OFFICE OF THE SECRETARY, DEPARTMENT OF TRANSPORTATION (AVIATION PROCEEDINGS) PART 221_TARIFFS--Table of Contents Subpart D_Manner of Filing Tariffs Sec. 221.31 Rules and regulations governing passenger fares and services. (a) Tariff rules and regulations governing passenger fares and services other than those subject to Sec. 221.30 may be filed electronically in conformity with subpart R. Such filings shall conform to criteria approved by the Department's Office of International Aviation as provided in Sec. 221.180 and shall contain at a minimum the information required by Sec. 221.202(b)(9). (b) Applications for special tariff permission may be filed electronically, as provided in Sec. 221.212. (c) Tariff publications and applications for special tariff permission covered by paragraphs (a) and (b) of this section may be filed in a paper format, subject to the requirements of this part and Department orders.