Determination of interest payable for delay or default in reversing input tax credit.

64. Where appropriate assessing authority is satisfied, that a dealer is liable to pay interest under sub-section (3) of section 33 in respect of any period for delay or default in reversing input tax credit, such authority shall determine under sub-section (1) of section 50, the interest payable for such period at any time not later than the date of assessment under section 45,or section 46.