One cannot legislate plain old commonsense.
We have had this argument for Years here at Rotorheads.
Landing on a Cart carries risk....even when done properly.
Trying to land on an un-chocked Cart...knowingly....is a bad mistake.....one this poor guy paid for with his Life.
Whether the "Rule" is written or merely "understood"....those that violate it do so at their own Risk.
The UK system has lots and lots of written rules....but the accident rate is comparable to the USA....so tell us again how all this Health and Safety protocols you have actually improve safety?