Good morning everybody.
In my opinion to make it easy, you fly on an FAA license a N-registered aircraft, therefore you have to comply with US rules and regs when it comes to licensing. Easy.
At an SAFA Check they check the aircraft docs, the pilots docs and usually they do a walk around the aircraft for any visual damages. They also looks inside at the emergency equipment, passenger briefing cards, o2, your Jeppesen and Flight docs. All In all it shouldn’t take longer then 30 min if you have your stuff together.
just my 50 cents to this