Oder hier:

"3.3.4 Descent
The aircraft shall cross the fix or facility and fly outbound on the specified track, descending as
necessary to the procedure altitude/height but no lower than the minimum crossing altitude/height
associated with that segment. If a further descent is specified after the inbound turn, this descent
shall not be started until the aircraft is established on the inbound track. An aircraft is considered
established when it is:
a. within half full scale deflection for the ILS and VOR; or
b. within ±5° of the required bearing for the NDB."