Have you tried the line of reasoning?
That as an EFP is a requirement for 12ft lb/16 joule Air Rifles in most EU Countries,
& the we are a member of the EU,
then a surely an 12ft lb/16 joule Air Rifle can be put on an EFP
for the purposes of travelling to & from competitions in EU countries & Europe in general.
I'm sure you have tried this, just a thought.
There has to be a way!