[Code of Federal Regulations] [Title 49, Volume 8] [Revised as of October 1, 2004] From the U.S. Government Printing Office via GPO Access [CITE: 49CFR1544.301] [Page 343] TITLE 49--TRANSPORTATION CHAPTER XII--TRANSPORTATION SECURITY ADMINISTRATION, DEPARTMENT OF HOMELAND SECURITY PART 1544_AIRCRAFT OPERATOR SECURITY: AIR CARRIERS AND COMMERCIAL OPERATORS--Table of Contents Subpart D_Threat and Threat Response Sec. 1544.301 Contingency plan. Each aircraft operator must adopt a contingency plan and must: (a) Implement its contingency plan when directed by TSA. (b) Ensure that all information contained in the plan is updated annually and that appropriate persons are notified of any changes. (c) Participate in an airport-sponsored exercise of the airport contingency plan or its equivalent, as provided in its security program.