PELs : Exemptions

Under the present proposals the exemptions from needing a PEL include 쳌emoving vehicles쳌f.

Does this then mean all musicians & singers will be free from prosecution if they hold their sessions on modes of transport?

What could these be?

Buses
Cars
Trains & boats & planes
Horse & cart
On horseback [if a horse qualifies as a vehicle]
A pushbike/tandem
A motorbike- possible for passenger to play a melodeon if seated facing away from the driver.
Hot air balloons
Submarines


more?