Commission Regulation (EEC) No 2814/91 of 25 September 1991 re-establishing the levying of customs duties on 5- tert-Butyl-2,4,6-trinitro-m-xylene, falling within CN code ex 2904 20 90, originating in China, to which the preferential tariff arrangements set out in Council Regulation (EEC) No 3831/90 apply.