WASHINGTON � The international environment for American business is difficult today and the recent U.S. Supreme Court decision on the unenforceability of World Court judgments doesn’t make it any easier, according to at least one veteran international litigator.

A 6-3 high court on March 25 held that the so-called Avena decision by the International Court of Justice (ICJ) was not directly enforceable federal law that overrode state limits on the filing of habeas corpus petitions by 51 Mexican death row inmates.