Address change for AMEX?

Was thinking of getting AMEX credit cards (trifecta hopefully), but although I live in a serviceable city with a rental agreement, my aadhar address and PAN etc are all for a tier 3 city where AMEX is not serviceable.

Found a way from this sub to change aadhar address for current address using rental agreement, get the card, and change it back. Had a few questions if anyone had done the same:

1. Do I need to change PAN address too along with aadhar?

2. Can I easily change it back once I get the card (and just update the address in amex later)