This above Petition was originally filed before the Tamil Nadu Taxation Special Tribunal and numbered as O.P.No.1033 of 2003. The said O.P was filed under Section 38-A of TNGST Act, declaring that Explanation V to Section 2(aa) of the Tamil Nadu General Sales Tax Act is unconstitutional and liable to be struck down as ultra vires Article 14, Article 19, Article 245 and 265 of the Constitution of India and Entry 54 of List 2 of Schedule VII and other relevant provisions of the Constitution of India including Article 366 Clause (29A) and quashing the same. Consequent to abolition of the above Tribunal, the said O.P was transferred to this Court and renumbered as W.P.No.36418 of 2005 (this Writ Petition).