Can input tax credit already earned be reduced by a rule made without a corresponding enabling provision in the parent Act?

Paragraph 41Applying the principles culled out from the above decisions to the facts of the present case, we find that respondent had earned input tax credit on purchase of iron and steel goods which it kept as its stock in trade to be used as inputs or raw materials in the manufacture etc. of taxable goods. State lowered the rate of tax with effect from 01.02.2014 on those goods. The related amendments in the rules i.e. Rule 21(8) of the Punjab VAT Rules were notified on 25.01.2014 to come into effect from 01.02.2014. There was however no corresponding provision in the parent statute i.e. Punjab VAT Act which permitted availing of input tax credit at the lower rate of tax on the existing stock in trade though the purchase of such input was already made at a higher rate of tax thereby reducing the quantum of credit. The enabling provision in the statute i.e. first proviso to Section 13(1) of the Punjab VAT Act came into force with effect from 01.04.2014. 41.1. The benefit of input tax credit is traceable to the statute. If the same has to be reduced, which will have an adverse civil consequence upon the beneficiary, it must have the requisite statutory sanction. In this case, the statutory sanction came on and from 01.04.2014 with the amendment of the first proviso to Section 13(1) of the Punjab VAT Act. Therefore, the High Court was justified in holding that prior to 01.04.2014, there was no statutory sanction to allow applicability of Rule 21(8) on the stock in trade i.e. on inputs already purchased for which transactions stood concluded at a higher rate of tax. 41.2. This issue can also be looked at from another angle. As we have seen, under sub-section (9) of section 13, a person is under a mandate to reverse input tax credit availed by him on goods which could not be used for the purposes specified in sub-section (1) of Section 13 of the Punjab VAT Act or which remained in stock at the time of closure of business. If the interpretation sought to be given to Rule 21(8) of the Punjab VAT Rules by the State is accepted, the natural corollary would be that reversal of input tax credit would be at the lower rate of tax on the goods in question when those goods could not be used for the purposes specified in Section 13(1) or which remained as part of the stock in trade at the time of closure of business. Such an interpretation besides being fallacious, would also lead to revenue loss for the State exchequer.