Does the Court of Justice have jurisdiction, with a view to forestalling divergent judgments, to interpret, in a manner binding on the courts of the Member States, the TIR Convention, approved on behalf of the European Economic Community by Council Regulation (EEC) No 2112/78 of 25 July 1978 concerning the conclusion of the Customs Convention on the international transport of goods under cover of TIR carnets (TIR Convention) of 14 November 1975 at Geneva (OJ 1978 L 252, p. 1, in force in the Community as from 20 June 1983), in so far as concerns the scope of Articles 8 and 11 of that convention, with regard to the assessment of liability of a guaranteeing association, also referred to in Article 457(2) of the regulation implementing the Community Customs Code (CCIP)?