(1) An assessing, appellate or revising authority including the Tribunal may, on an application or otherwise, at any time within a year from the date of any order passed by it, rectify any error apparent on the face of the record:
Provided that no such rectification which has the effect of enhancing the liability to pay tax or penalty or penal interest shall be made unless such authority has given notice to the person affected and have allowed him a reasonable opportunity of being heard.
(2) Where such rectification has the effect of enhancing the tax liability or penalty, the Assessing Authority shall give the dealer or other person a notice and the dealer or other person shall pay the tax in the manner prescribed and when such rectification has the effect of reducing the tax liability or penalty the Assessing Authority shall issue refund of the excess tax, if any, paid.