Commission Regulation (EEC) No 911/79 of 7 May 1979 re-establishing the levying of customs duties on angles, shapes and sections, of iron or steel, etc., falling within subheadings 73.11 A II, III, IV a) 2 and b) and originating in Romania, to which the preferential tariff arrangements set out in Council Regulation (EEC) No 3156/78 apply