commiss opinion novemb portugues govern implement council direct eec pilotag vessel deep sea pilot north sea english channel eec letter date juli offic perman repres portug european commun inform commiss requir articl abovement direct administr measur publish portugues director gener merchant ship march pilotag vessel fly portugues flag deep sea pilot oper north sea english channel examin administr measur assur commiss portugues govern fulli implement provis direct applic brussel novemb commiss stanlei clinton davi member commiss oj