In terms of skill sets, the Canadian Welding Bureau, for instance, has testing modules across the world. As Chris mentioned, if they want to bring welders in, there are different testing booths they can do around the world. I don't know if that would be the same, but it's not just the dangers of electricity, it's also the methods and codes. For instance, I mentioned earlier the auto factory individuals who hooked up to the wrong side of the power. It was a much higher voltage that would have blown the transformer and ruined the equipment, but it also could have hurt somebody in the process. It's a bit difficult on that end as well.
Don't get me wrong; there are some very skilled electricians from other countries, for sure. I'm not doubting that whatsoever. But I think when they get here, maybe there's an aptitude test given, not only on the code but also on the practices.