The principal notification was published in the Gazette of India, Extraordinary, vide number G.S.R. 537 (E), dated the 17th August, 2005 and was last amended vide notification number 30/2006-Central Excise, dated the 9th May, 2006, published in the Gazette of India, Extraordinary, vide number G.S.R. 279(E), dated the 9th May, 2006.