! 21. 12. 9 Official Journal of the European Communities No L 352/63 COMMISSION REGULATION (EEC) No 3751/91 of 19 December 1991 re-establishing the levying of customs duties on products falling within CN code 2523, originating in Czechoslovakia, to which the preferential tariff arrangements set out in Council Regulation (EEC) No 3831/90 apply THE COMMISSION OF THE EUROPEAN COMMUNITIES, Having regard to the Treaty establishing the European Economic Community, Having regard to Council Regulation (EEC) No 3831/90 of 20 December 1990 applying generalized tariff pref- erences for 1991 in respect of certain industrial products originating in developing countries ('), and in particular Article 9 thereof, Whereas, pursuant to Article 1 of that Regulation, customs duties on certain products originating in each of the countries or territories listed in Annex III are totally suspended, and the products as such are, as a general rule, Community, originating subject to statistical surveillance every three months on the reference base referred to in Article 8; Whereas, as provided for in Article 8, where the increase of preferential imports of these products, originating in one or more beneficiary countries, threatens to cause economic difficulties in a region of the Community, the levying of customs duties may be re-established, once the Commission has had an appropriate exchange of informa- tion with the Member States ; whereas for this purpose the reference base to be considered is equal, as a general rule, to 6,3 % of the total importations into the Community from third countries in 1988 ; Whereas, in the case of products falling within CN code 2523, originating in Czechoslovakia, the reference base is fixed at ECU 7 464 000 ; whereas that reference base was reached on 30 October 1991 by charges of imports into the Community of the products in question originating in Czechoslovakia ; whereas the exchange of information organized by the Commission has demonstrated that continuance of the preference threatens to cause economic difficulties in a region of the Community; whereas, therefore, customs duties for the products in question must be re-established with regard to Czechoslo- vakia, HAS ADOPTED THIS REGULATION : . Article 1 As from 24 December 1991, the levying of customs duties, suspended pursuant to Council Regulation (EEC) No 3831/90, shall be re-established on imports into the Community of the following products, originating in Czechoslovakia : CN code Description 2523 Portland cement, aluminous cement, slag cement, supersulphate cement and similar hydraulic cements, whether or not coloured or in the form of clinkers Article 2 This Regulation shall enter into force on the third day following its publication in the Official Journal of the European Communities. This Regulation shall be bindin;g in its entirety and directly applicable in all Member States. Done at Brussels, 19 December 1991. () OJ No L 370, 31. 12. 1990, p. 1. For the Commission Christiane SCRIVENER Member of the Commission