Circular No. 594-Income tax The agents of Standardised Agency System, Post Office Time Deposits and Unit Trust of India, have drawn the attention of the Board to the fact that where no detailed accounts are maintained and the gross commission received by them is less than Rs. 60,000, the benefit of an ad hoc deduction for expenses, at the rate of 50 per cent of the gross receipts of commission, is available to the authorised agents of Unit Trust of India and the agents of the following securities