Exemption of polyester filament yarn from special excise duty, subject to subsequent rescission by later notification. Exempts polyester filament yarn (other than textured) of denierage above specified threshold and of tenacity exceeding specified threshold, falling under heading No. 54.02, from the whole of the Special duty of excise leviable under the Second Schedule to the Central Excise Tariff Act, 1985, by Notification No. 36/2004 CE dated 9 July 2004, subsequently rescinded by a later notification.