S. 44C: Non-residents-Head office expenditure-Broad and inclusive-No indication that “exclusive expenditure”-expenditure exclusively incurred for branch in India, to be excluded from its ambit-“Attributable to”-Encompasses both shared expenses allocated to India branches and exclusive expenses incurred for India branches-Expense was common expense or exclusively for Indian branch not material so long as expense incurred for business or profession-Allowable as deduction-Expenditure incurred outside India-Authorities have not recorded factual finding-Matters remanded to the Tribunal-“Attributable”-“Exclusive”-“Attributable to”-“Derived from”-Interpretation of taxing statues-Strict interpretation-DTAA-India-United States of America. [S.37(1), Art. 7(3),]