Can anyone help me out here. When flying in China, and given a climb/descend to FL clearance with no time requirement ( ie when ready climb/descend to.... or climb/descend now to FL etc) when are you expected to leave current FL by? I thought ICAO law was within 2 mins but was corrected to 1 min. Off course China doesn't run by ICAO standards
so was hoping someone might have any references that states the actual reqs?
fj01