Air traffic control procedure
Standard Air Traffic Control Procedures defined by Minister of Land, Infrastructure and Transport is applied to air traffic control procedure. However, Air Traffic Control(FAA order 7110.65) or Air Traffic Management(ICAO Doc 4444) may be applied in a case that such a procedure is not defined by Standard Air Traffic Control Procedures.
Construction procedure for instrument flight procedure
Aircraft Operations(ICAO Doc8168) is applied to construction procedure for instrument flight procedure. However, United States Standard for Terminal Instrument Procedure(TERPS 8260.3) may be applied in a case that the establishment of instrument flight procedure is impossible by the application of ICAO regulations concerned because of ground obstacles, limitation of airspace utilization and so on.
Category 1(CDR 1) : A conditional route that is available for flight planning during specific times published in the Aeronautical Information Publication(AIP) ENR3.
Category 2(CDR 2) : A conditional route that is available for flight planning during times specified by special measures such as NOTAM.
Category 3(CDR 3) : A conditional ATS route that is not available for flight planning unless ATC units may issue tactical clearances.