GST classification change: Schedule entry for fire-extinguisher preparations was omitted, modifying their taxable treatment under Schedule rules. Entry 3813 in Schedule 4, previously describing preparations and charges for fire-extinguishers and charged fire-extinguishing grenades, was omitted by Notification No. 43/2017 effective 15-11-2017, removing that Schedule entry's classification and its associated GST treatment until the noted date.