[imparvez]

That's quite interest to know. However I was going to limit myself till the introductions are made when there's a match. And leave them to discuss the terms. Like travel/stay/pay etc. Now that you've mentioned this I'll need to do some reading up. Thanks :)

[lvs]

For the US, you probably want to look into the US Supreme Court case Walling v. Portland Terminal. Generally speaking (again, IANAL), it sounds like the exemptions have to do with ensuring it's an educational experience that benefits the trainee more than the employer.