“March 12 [1996]. President [William Bill] Clinton signs the Cuban Liberty and Democratic Solidarity (Libertad) Act (also known as the Helms-Burton Act) which imposes penalties on foreign companies doing business in Cuba, permits U.S. citizens to sue foreign investors who make use of American-owned property seized by the Cuban government, and denies entry into the U.S to such foreign investors.” [Pro Embargo]
Jerry A. Sierra, “Economic Embargo Timeline,” HistoryofCuba.com