commiss opinion novemb address danish govern implement council direct eec pilotag vessel deep sea pilot north sea english channel danish text authent eec letter date april offic perman repres denmark european commun commiss requir articl direct eec circular publish ministri industri juli deep sea pilot north sea english channel skagerrak commiss regret contrari articl danish govern compli oblig consult commiss adopt circular question oblig adopt measur januari examin circular satisfi commiss danish govern fulli implement provis articl direct implement articl commiss consid present polici suffici pilot meet demand danish author issu certif deep sea pilot case commiss ask shown document question subject reserv commiss consid danish govern fulli implement direct eec brussel novemb commiss giorgio contogeorgi member commiss oj