commiss decis juli anim health measur regard enzoot bovin leukosi eec commiss european commun regard treati establish european econom commun regard council direct eec june anim health problem affect intra commun trade bovin anim swine amend direct eec subparagraph articl thereof kingdom denmark feder republ germani appli nation programm erad enzoot bovin leukosi number year programm led mark reduct preval diseas subparagraph articl direct eec author member state requir high pure bred breed bovin enter intra commun trade herd anim month ag react neg serolog test previou month due favour diseas posit kingdom denmark feder republ germani period time herd origin test extend month measur provid decis accord opinion stand veterinari committe adopt decis articl kingdom denmark feder republ germani recogn provid adequ guarante enzoot bovin leukosi mean subparagraph articl direct eec articl decis address member state brussel juli commiss fran andriessen vice presid oj oj