S. 9(1)(vi) : Income deemed to accrue or arise in India-Royalty-Non-resident-Use of equipment-Right to use-Source code of licensed software not provided to customers who had no right to exploit assessee’s intellectual property rights-Receipts not royalty or fees for included services-DTAA-India-United States of America [S. 144C(13) 147, Art. 12(3), 12(4)(b)]