S. 40(a)(i) : Amounts not deductible-Deduction at source-Non-resident-Non-Resident had no Permanent Establishment in India-Non-discrimination clause in Double Taxation Avoidance Agreement applicable-Disallowance is not justified-Provisions of agreement more beneficial to assessee is applicable-DTAA-India-Japan-United States of America.[S.9O, 195, art. 24(3), 26(3)]