Changes made by Commission Regulation (EEC) No 3939/87 of 21 December 1987 amending certain acts in respect of the application of the common organization of the markets in the sheepmeat and goatmeat sector as a consequence of the introduction of the combined nomenclature: Council Regulation (EEC) No 2641/80 of 14 October 1980 derogating from certain import rules laid down in Regulation (EEC) No 1837/80 on the common organization of the market in sheepmeat and goatmeat