“…The United States unilaterally revoked Cuba’s ‘Most Favored Nation’ status and the previously agreed preference under the Exclusive Supplemental Agreement to the General Agreement on Trade and Tariffs, to which both countries were signatories. The instrument used for this action was the Department of the Treasury’s Decision 55636 of 13 June 1961, in effect since 24 May 1962. Section 401 of the Tariff Classification Act of 1962…denied Cuba the Most Favored Nation (MFN) status in trade and canceled the applicability of tariff preferences for Cuba for as long as the MFN status was suspended…”

“John F. Kennedy (D). Timeline,” Cuba versus Blockade: Cuban People’s website, 2007