“October [1990] In alliance with conservative Republicans, Cuban émigrés and the U.S. Congress pass the Mack Amendment, which prohibits all trade with Cuba by subsidiaries of U.S. companies located outside the U.S., and proposes sanctions or cessation of aid to any country that buys sugar or other products from Cuba.” [The 15th of the month used for date sorting purposes only.] [Pro Embargo]
Jerry A. Sierra, “Economic Embargo Timeline,” HistoryofCuba.com