Ok, I heard back...
Burms and retics are perfectly legal. They have put caging restrictions in place however. Apparently the caging restrictions are "pretty ridiculous" and geared towards discouraging people from keeping the giants. But they are legal.
As for expos, there is one big one in the Stockholm area, which he says is the best one.
If you have any other questions I'd be happy to reach out and he's happy to help.