commiss opinion decemb address govern kingdom netherland draft implement measur adopt secretari transport implement council direct eec januari reciproc recognit navig licenc inland waterwai vessel eec letter april offic perman represent govern kingdom netherland submit opinion commiss draft implement measur adopt secretari transport march implement council direct eec januari reciproc recognit navig licenc inland waterwai vessel commiss note measur contain draft adopt secretari transport netherland compli provis direct commiss deliv favour opinion brussel decemb commiss richard burk member commiss oj