S. 37(1) : Business expenditure-Assessee, following a consistent method of accounting, has offered EIS to tax on proportionate basis as and when they have accrued over tenure of loan and same has been accepted by revenue-in accordance with RBI norms as well as AS-9-Therefore, keeping in view principle of prudence as well as rule of consistency, no fault could be found with accounting methodology adopted by assessee to recognize revenue under securitization transactions. [S. 145]