That the assessee were assessed to tax under the Tamilnadu General Sales Tax Act, 1959 for the assessment year 2002-2003 vide original assessment order dated 2.11.2005 and for the assessment year 2003-2004 vide the original assessment order dated 27.1.2005. In the said original assessment orders the assessing officer had allowed concessional rate of tax claimed by the assessee for the purchases under Section 3(5) of the Tamilnadu General Sales Tax Act, 1959 by issue of Form XVII declaration forms. Thereafter, the assessing officer had invoked Section 16 of the Tamilnadu General Sales Tax Act, 1959 and assessed the disputed turnover to a higher rate of tax holding that the purchase of spares separately was not eligible for concessional rate of tax provided under Section 3(5) of the Tamilnadu General Sales Tax Act, 1959. The revision order under Section 16(1) was passed on 24.11.2005 and 2.11.2005 for the assessment years 2002-2003 and 2003-2004 respectively. In addition to re-calling the concessional rate of tax allowed in the original assessment, the assessing officer did slap a penalty of Rs.47,376/- and Rs.31,232/- for the