(1) A registered dealer entitled to refund in pursuance of any order under this Act including assessment or in pursuance of any order by any Court, shall be entitled to receive, in addition to the refund, simple interest at the rate of nine percent per annum for the period commencing after ninety days of the application claiming refund in pursuance to such order till the date on which the refund in granted.

(2) The interest shall be calculated on the amount of refund due after deducting therefrom any tax, interest, penalty or any other dues under this Act.

(3) If, as a result of any order passed under this Act, the amount of such refund is enhanced or reduced such interest shall be enhanced or reduced accordingly.

(4) When a dealer is in default or is deemed to be in default in making the payment in pursuance of any assessment under this Act, he shall be liable to pay simple interest on such amount at the rate of one and half percent per month from the date of such default for so long as he continues to make default in the payment of the said tax.

(5) Where as a result of any final order the amount of tax (including any penalty) due or in default is wholly reduced, the amount of interest, if any, paid shall be refunded, or if such amount is modified, the interest due shall be calculated accordingly and any excess amount of interest paid shall be refunded.

(6) Where any amount of tax payable is enhanced by any such order, interest shall be payable on the amount by which the tax is enhanced.

(7) Where the realisation of any amount remains stayed by the order of any Court or authority and such order is subsequently vacated, interest shall be payable also for any period during which such order remained in operation.

(8) The interest payable under this Act shall be deemed to be tax due under this Act.