Trying to help a relative flying MAA-DEL-SFO on AI (43 -> 173) and concerned about the transit in DEL.

From reading this thread, it appears she will clear immigration in MAA ("I" in BP), direct transfer in DEL ("DT" in BP) to the gate -- as listed here.

Is there anything else she needs to be aware of? She has 4+hrs in between the flights.

Thanks.