The monthly duty payable on notified goods shall be paid by the 5th day of same month and an intimation in Form - 2 shall be filed with the Jurisdictional Superintendent of Central Excise before the 10th day of the same month:

Provided that monthly duty payable for the month of July, 2008 shall be paid on or before 15th day of July, 2008:

Provided further that monthly duty payable for the month of March, 2015 shall be paid on or before the 15th day of March, 2015

Provided also that if the manufacturer fails to pay the amount of duty by due date, he shall be liable to pay the outstanding amount along with the interest at the rate specified by the Central Government vide notification under section 11AA of the Act on the outstanding amount, for the period starting with the first day after due date till the date of actual payment of the outstanding amount:

Provided also that in case of increase in the number of operating packing machines in the factory during the month on account of addition or installation of packing machines, the differential duty amount, if any, shall be paid by the 5th day of the following month:

Provided also that in case a manufacturer permanently discontinues manufacturing of goods of existing retail sale price or commences manufacturing of goods of a new retail sale price during the month, the monthly duty payable shall be recalculated pro-rata on the basis of the total number of days in that month and the number of days remaining in that month counting from the date of such discontinuation or commencement and the duty liability for the month shall not be discharged unless the differential duty is paid by the 5th day of the following month and in case the amount of duty so recalculated is less than the duty paid for the month, the balance shall be refunded to the manufacturer by the 20th day of the following month:

Provided also that if there is revision in the rate of duty, the monthly duty payable shall be recalculated pro-rata on the basis of the total number of days in that month and the number of days remaining in that month counting from the date of such revision and the duty liability for the month shall not be discharged unless the differential duty is paid by the 5th day of the following month and in case the amount of duty so recalculated is less than the duty paid for the month, the balance shall be refunded to the manufacturer by the 20th day of the following month:

Provided also that in case it is found that a manufacturer has manufactured goods of those retail sale prices, which have not been declared by him in accordance with provisions of these rules or has manufactured goods in contravention of his declaration regarding the plan or details of the part or section of the factory premises intended to be used by him for manufacture of notified goods of different retail sale prices and the number of machines intended to be used by him in each of such part or section, the rate of duty applicable to goods of highest retail sale price so manufactured by him shall be payable in respect of all the packing machines operated by him for the period during which such manufacturing took place:

Provided also that in case a manufacturer does not pay the duty payable by the due date, and continues to operate any packing machine, then till the time such non-payment continues, he shall be liable to pay the monthly duty based on the number of operating packing machines declared in the month for which duty was last paid by him or the total number of packing machines found available in his premises at any time thereafter, whichever is higher:

Provided also that in case a new manufacturer commences production of notified goods in a particular month, his monthly duty payable for that month shall be calculated pro-rata on the basis of the total number of days in the month and the number of days remaining in that month starting from the date of commencement of the production of such notified goods and shall be paid within five days of such commencement.