Regulatory fee obligations require recognised stock exchanges to remit scheduled fees and interest for late payment. Recognised stock exchanges must pay a regulatory fee to the Board on annual turnover (excluding agricultural commodity derivatives, subject to a separate flat fee) and an amount equal to ten per cent of listing fees collected each month, both payable within fifteen days from the end of the relevant month. Payments must be made by electronic modes specified by the Board and accompanied by a chartered accountant certified statement of computation. Exchanges must maintain registers, furnish returns and additional information as required. Defaults in payment attract interest at fifteen per cent per annum on unpaid, belatedly paid or short-paid amounts for every month or part thereof.