I am not familiar with with the rules for piercers
and I am certain they are different in different
countries but what from of anaesthetics are they
legally allowed to administer and at what strength?
Yep, but you do get one advantage which is the needles piercers use are incredibly sharp. It can be a huge (in diameter) needle but it will feel like a pinprick.
Can confirm. It certainly wasn't painless, but my experience didn't merit anaesthetics. Even the slight pain in the hours afterwards wasn't all that noteworthy.
Or do you just bite down on a bullet?