(a) where it is required to issue a notice in Form No. 24, the appropriate assessing authority shall serve upon such dealer a notice in such form directing him to pay the amount of interest payable by him by the date specified in such notice and he shall also fix a date on which the dealer shall produce the receipted challan in proof of such payment.

(b) where it is required to issue a notice in Form No. 27, the appropriate assessing authority shall serve upon such dealer a notice in such Form directing him to pay the amount of interest payable by him by the date specified in such notice and he shall also fix a date on which the dealer shall produce the receipted challan in proof of such payment.

(2) The appropriate assessing authority shall fix a date not less than, thirty days from the date of service of the notice in Form No. 27 or, fifteen days from the date specified in the notice in Form No. 24, after which the said Form No. 24 will be converted into a notice of demand, for payment of interest payable by a dealer according to such notice. :

Provided that, where on account of delay in service of the notice in Form No. 27, the dealer is denied of the minimum time of thirty days for compliance with such notice, he may, on application filed within ten days from the date of receipt of such notice, be allowed such further time as falls short of thirty days from the date of service of such notice.