[MikeE]

Almost any intentional movement of a tube while possessing another appears to violate <G34> but from my observation of matches it's being called only when there appears to be intent to gain an advantage by herding, and even then it's only called some times.

For example, if a robot in possesion of a tube were to deliberately push a tube sideways to clear a path to their zone then by <G34> it is probably a penalty, but I wouldn't expect it to be called. However if a team are pushing the tube into their scoring zone while possessing another then I would expect it to be called (although in practice it doesn't seem to be called as often as I expect).