[Code of Federal Regulations] [Title 32, Volume 2] [Revised as of July 1, 2008] From the U.S. Government Printing Office via GPO Access [CITE: 32CFR245.27] [Page 547] TITLE 32--NATIONAL DEFENSE CHAPTER I--OFFICE OF THE SECRETARY OF DEFENSE (CONTINUED) PART 245_PLAN FOR THE EMERGENCY SECURITY CONTROL OF AIR TRAFFIC (ESCAT)--Table Subpart F_Procedure for Movement of Air Traffic Under ESCAT Sec. 245.27 Data entry. Aircraft will file IFR or VFR flight plans, assigned a discrete transponder code, and must be in direct radio communication with ATC. The appropriate EATPL number will be entered in the remarks section of the flight plan. The EATPL number will be passed with flight plan data from one ATC facility to the next, and to the appropriate air defense control facilities.