In my experience any ET procedure which is required to be speed limited is annotated as such (INN, SZG and CMF spring instanltly to mind), therefore I would assume that if no such limit applied I could accel to min clean at accel altitude (as specified) - it is, however, best to ask your performance ?department? to make sure they have it right!
EDIT following OS post: CMF R18 is one where you may well need to throttle back during the ET!