Im a Danish citizen, married to a us citizen. I called up ATP to inquire about their CFII and MEI course. The guy on the phone was very helpfull up to the point when i told him about my immigration-status. He told me that greencard holders and people with work authorization can't work or train with ATP, only US citizens. This does'nt make any sense to me. Can anybody clarify this? Is it true?

Thanks