Tax exemption on intra-state supplies of specified used motor vehicles limits tax to the supplier margin at notified rates. Exemption of state tax on intra state supplies of specified old and used motor vehicles is provided by taxing only the margin of the supplier at notified rates for each vehicle category; margin is computed as consideration minus depreciated value for depreciated assets or as selling price minus purchase price otherwise, with negative margins ignored, and the exemption does not apply where the supplier has availed input tax credit, CENVAT, VAT credit or other tax credits.