charges shall be paid by the Bank on or before the … day of each calendar …. The Charges will be at Baht … (… Baht only) per … and subject to reasonable increase in relation to the direct costs and expenses of ICBCTL in future. The Charges and their increase shall be subject to non-discrimination rule and equal and fair treatment. If the due date of any Charges falls on a bank or public holiday, such Charges shall be paid by the Bank on the business day after such due date. Late payment of any Charges shall be subject to penalty at the rate of … per cent per annum on the unpaid amount if the Charges is made later than the … day of the month calculated from the due date until such amount is fully paid by the Bank.