Registration as RTP or NRI

Sir,
Please give your inputs:
Land owner is NRI having business place in AP.
He wants to enter into JDA and sells his share of flats before obtaining occupancy certificate as he is liable for that flats.

So, he wants to get registered as regular tax payer and appoint one person as authorised person at the time of registration itself.

Can we proceed with..!!?

or shall he get registered as NRI...?

Thanks in advance 🙏