In theory the regulation is the same. By "enforcing" I meant making sure the practice matches the theory. I remember finding out that if a pilot has a "conflic

In theory the regulation is the same. By "enforcing" I meant making sure the practice matches the theory. I remember finding out that if a pilot has a "conflict of personality" with another pilot they can just check a box on a form and they never end up on the same crew. This was after one difficult pilot bullied his young co-pilot until the latter made an error (failed to read the altitude) that cost the lives of all people on the plane. The rule likely applies to every airline flying in the US. But actually enforcing it is a lot harder to enforce half way around the globe or somewhere where that safety culture you mention is different. There's a chance the punitive measures are also applied differently, where in the US someone might go to prison for failing to properly apply regulation.