William J. Brennan, Jr.

“ The American longshoremen's short-term, irregular and casual connection with the respective vessels plainly belied any involvement on their part with the ships' 'internal discipline and order.' Application of United States law to resolve a dispute over the wages paid the men for their longshore work, accordingly, would have threatened no interference in the internal affairs of foreign-flag ships likely to lead to conflict with foreign or international law. ”

“ So long as employers are effectively denied determinations by the NLRB as to whether 'arguably protected' picketing is actually protected except when an employer is willing to threaten or use force to deal with picketing, I would hold that only labor activity determined to be actually, rather than arguably, protected under federal law should be immune from state judicial control. ”

“ In Benz a foreign-flag vessel temporarily in an American port was picketed by an American seamen's union, supporting the demands of a foreign crew for more favorable conditions than those in the ship's articles which they signed under foreign law, upon joining the vessel in a foreign port. In McCulloch an American seamen's union petitioned for a representation election among the foreign crew members of a Honduran-flag vessel who were already represented by a Honduran union, certified under Honduran labor law. ”