Penalty for non-payment of assessed demand

Where a person fails to make payment of the tax assessed or interest levied or penalty imposed on him or any other amount due from him under this Act within a period of thirty days from the date of service of the notice of demand, he shall be liable, in addition to the interest and the amount due, to pay, by way of penalty, a sum equal to two per cent per month of such amount of tax, penalty, interest or any other amount due for the period for which payment has been delayed by him after the date on which such amount was due to be paid.