Oh, I see. Well, here's the thing: I can tell you, on fairly good authority, what UA would do at SFO on a SFO-SIN-DEL connection with an overnight. But that doesn't necessarily have any bearing at all on what, say, EK might do on a CDG-DXB-DEL connection with an overnight. And the only rule on the subject is that the airline is within its rights to see evidence of admissibility. Which airlines do that at the beginning of travel? That's really a question for those fora.