S. 90 : Double taxation relief-Non-resident-Tests-Fixed place permanent establishment-Assessee company providing remittances services to non-residents in USA-Liaison office set up in India under conditional permission granted by Reserve Bank of India-Reports to Reserve Bank of India not showing any violations of conditions-No material to establish that liaison office at disposal of assessee or belonged to assessee to conduct its business wholly or partly-Nature of activities of liaison office preparatory and auxiliary-Liaison office not permanent establishment of assessee.-Not exigible to tax in India-DTAA-India-USA. [Art. 5(1), 5(2), 5(3)]