[221-A. (1) Where the owner or occupier primarily liable for payment of tax in respect of any premises has not paid by the date fixed by the Corporation in this behalf the tax or a part of the tax payable by him under this Act, simple interest at the rate of twelve per cent per annum from the date fixed for payment of tax upto the date of payment shall be payable by him upon the amount that has remained unpaid.
(2) Without prejudice to the provisions of sub-section (1), where the owner or occupier of any premises has paid tax under section 207- A on the basis of his own assessment and the tax so paid is found by the Corporation to be less than the amount of tax payable by him, simple interest at the rate of twelve per cent per annum upon the amount by which the tax so paid falls short of the tax which is found to be payable, shall be payable by him from the date fixed by the Corporation for payment of tax upto the date the amount of such difference is paid. ]