If most states honor the NAC suspension, could the UFC book him on a card in Brazil or Mexico ?
They could, but they won't.
All bout dat Vegas money
Is it ok to cheat on a spouse if it's outside the country and out of the jurisdiction of a court?
No, not unless the UFC lets him go. But no other is going to pay Nick the money he deserves
He is both suspended AND under contract. The contract is his real limitation at this point (he can fight without the NSAC but he can't while under contract)