Interest payable on dues for taxes.

If a person on whom a notice of demand has been served under section 146 does not, within fifteen days from the service of such notice, pay the sum demanded in the notice, he shall be liable to pay by way 01 ~nterest, in addition to the sum and other charges due, -- (a) one-half percent, of the sum due for each complete month for the first six months, from the date of the expiry of the period of fifteen days aforesaid; and (b) one percent, of the sum due for each complete month thereafter', during the time he continues to make default in the payment of the slua due. The amount of interest shall be recovered in the same manner as the sum due is recoverable: Provided that the Chief officer may, in such circumstances as may be prescribed, and an appellate authority or the authority to whom revision application is made may, remit the whole or any part of the interest payable in respect of any period.