(a) Every proceeding of appeal, revision, review or reference relating to a claim for input tax credit initiated whether before, on or after the appointed day, under the existing law shall be disposed of in accordance with the provisions of the existing law, and any amount of credit found to be admissible to the claimant shall be refunded to him in cash in accordance with the provisions of the existing law and the amount rejected, if any, shall not be admissible as input tax credit under this Act:
Provided that no refund shall be allowed of any amount of input tax credit where the balance of the said amount as on the appointed day has been carried forward under this Act.
(b) Every proceeding of appeal, revision, review or reference relating to recovery of input tax credit initiated whether before, on or after the appointed day, under the existing law shall be disposed of in accordance with the provisions of the existing law, and if any amount of credit becomes recoverable as a result of such appeal, revision, review or reference, the same shall, unless recovered under the existing law, be recovered as an arrear of tax under this Act and the amount so recovered shall not be admissible as input tax credit under this Act.