1 . Common Customs Tariff - Tariff headings - Classification of the goods - Material giving composite goods their "essential character" within the meaning of Rule 3 ( b ) of the Rules for the Interpretation of the Nomenclature - Method of identification 2 . Common Customs Tariff - Tariff headings - Semi-finished products in sheet form, composed of epoxy resin, carbon fibre and glass-fibre mesh, intended for the manufacture of tubing - Classification under heading 39.01