Where the assessee was a company incorporated in the Netherlands and its main activity was operation of aircrafts in international traffic both for transport of passengers and cargo and its income was exempt under the Double Taxation Avoidance Agreement between India and the Netherlands and it recovered charges from an Indian company which on facts was found to be arising from the activity of cargo handling and was directly and inextricably linked to such activity, held the same was exempt. Also held in the alternative that even if the recovery of rent was to be treated as an income from other sources at the hands of the assessee, since an identical amount was paid to the Airport Authority of India, the same would be entirely offset u/s 57 (iii) against each other because there was a direct nexus between the receipt and the payment.