Book excerpt: Since the early 1960s, the U.S. has maintained an embargo on Cuba through various laws, regulations, and presidential proclamations re: trade, travel, and financial transactions. In Sept. 2009, Treasury and Commerce published regulatory changes that further ease some embargo restrictions. These amended regulations further ease restrictions on travel, remittances, gifts, and exports to Cuba. This correspondence describes: (1) the Sept. 2009 changes to the embargo; (2) options available to the Pres. to further modify the embargo; (3) actions that the Pres. can or must take in the event of certain changes in the Cuban gov¿t.; and (4) possible congressional actions to end the embargo. Charts and tables.