When the level of the transition altitude is lower than 3 050 m (10 000 ft) AMSL, FL 100 should be used in lieu of 10 000 ft. Competent authority may also exempt aircraft types, which for technical or safety reasons, cannot maintain this speed.    ,
    Pilots shall maintain continuous air-ground voice communication watch and establish two-way communication, as necessary, on the appropriate communication channel in RMZ.    ,
    Air-ground voice communications mandatory for flights participating in the advisory service. Pilots shall maintain continuous air-ground voice communication watch and establish two-way communication, as necessary, on the appropriate communication channel in RMZ.    ,

 A ,IFR only,All aircraft,Air traffic control service,Not applicable,Yes,Yes,Yes,
 B ,IFR,All aircraft,Air traffic control service,Not applicable,Yes,Yes,Yes,
VFR,All aircraft,Air traffic control service,Not applicable,Yes,Yes,Yes,
 C ,IFR,  IFR from IFR    IFR from VFR  ,Air traffic control service,Not applicable,Yes,Yes,Yes,
VFR,VFR from IFR,    Air traffic control service for separation from IFR;       Air traffic control service, VFR/VFR traffic information (and traffic avoidance advice on request)     ,  250 kts IAS below    3 050 m    (10 000 ft) AMSL  ,Yes,Yes,Yes,
 D ,IFR,IFR from IFR,  Air traffic control service, traffic information about VFR flights    (and traffic avoidance advice on request)  ,  250 kts IAS below    3 050 m    (10 000 ft) AMSL  ,Yes,Yes,Yes,
VFR,Nil, Air traffic control service, IFR/VFR and VFR/VFR traffic information (and traffic avoidance advice on request) ,  250 kts IAS below    3 050 m    (10 000 ft) AMSL  ,Yes,Yes,Yes,
 E ,IFR,IFR from IFR,Air traffic control service and, as far as practical, traffic information about VFR flights,  250 kts IAS below    3 050 m    (10 000 ft) AMSL  ,Yes,Yes,Yes,
VFR,Nil,Traffic information as far as practical,  250 kts IAS below    3 050 m    (10 000 ft) AMSL  ,No ,No ,No,
 F ,IFR,IFR from IFR as far as practical,Air traffic advisory service; flight information service if requested,  250 kts IAS below    3 050 m    (10 000 ft) AMSL  ,Yes ,No ,No,
VFR,Nil,Flight information service if requested,  250 kts IAS below    3 050 m    (10 000 ft) AMSL  ,No ,No ,No,
 G ,IFR,Nil,Flight information service if requested,  250 kts IAS below    3 050 m    (10 000 ft) AMSL  ,Yes ,No ,No,
VFR,Nil,Flight information service if requested,  250 kts IAS below    3 050 m    (10 000 ft) AMSL  ,No ,No ,No,