[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: 14CFR256.4] [Page 212] TITLE 14--AERONAUTICS AND SPACE CHAPTER II--OFFICE OF THE SECRETARY, DEPARTMENT OF TRANSPORTATION (AVIATION PROCEEDINGS) PART 256_DISPLAY OF JOINT OPERATIONS IN CARRIER-OWNED COMPUTER RESERVATIONS SYSTEMS--Table of Contents Sec. 256.4 Display of information. (a) A system vendor shall not deny access to its system to two or more carriers whose flights share a single designator code, absent a determination by the Board that the use of the code constitutes a violation of 49 U.S.C. 1381. (b) A system vendor shall not discriminate against any carrier on the basis of that carrier's using the same designator code as another carrier, either by display bias, or any other means relating to providing the system.