"Restrictions on travel and remittances to Cuba have constituted a key and often contentious component in U.S. efforts to isolate Cuba's communist government since the early 1960s. Such restrictions are part of the Cuban Assets Control Regulations (CACR), the overall embargo regulations administered by the Treasury Department's Office of Foreign Assets Control (OFAC). Various Administrations, including the current one, have eased and tightened the restrictions over the years as U.S. policy toward Cuba has changed. The Obama Administration lifted all restrictions on family travel and remittances in 2009. In 2011, the Administration eased restrictions on other types of travel, including travel related to religious, educational, and people-to-people exchanges, and allowed any U.S. person to send remittances to individuals in Cuba."
CRS Report for Congress, RL31139
Federation of American Scientists: http://www.fas.org/sgp/crs/index.html