A Miami federal judge has ruled that four major cruise lines—Carnival, Norwegian, Royal Caribbean and MSC Cruises—violated a ban on tourism and engaged in “trafficking” of confiscated property by allowing passengers to disembark at a port terminal in Havana that was confiscated decades ago by the communist government in Cuba following the Cuban Revolution.

The ruling, issued Monday by U.S. District Judge Beth Bloom of the Southern District of Florida, represents a rare win for a claimant brought under Title III of the Helms-Burton Act that aims to compensate individuals whose property was confiscated in Cuba.