S. 9(1)(i) : Income deemed to accrue or arise in India-Business connection-Permanent Establishment-Agency PE-Computer information system (CRS)-Computer, electronic hardware / software and connectivity is provided through third party nodes located in India-Constitute PE of and income arising from airlines and travel agents is attributable to activities of PE in India and taxable in India-Income attributable to assessee’s PE in India was to be determined at 15 per cent instead of 75 per cent as determined by AO.-Royalties / Fees for technical services-CRS and ARS was installed at airport which could be accessed only by airlines, payments made in relation to ARS could not be characterised as royalty either under section 9 or under India-Spain DTAA-DTAA-India-Spain. [S. 9(1)(vi), 9(1)(vii), Art. 5, 13]