From the Document: "The Andean Trade Preference Act (ATPA) extends duty-free treatment to certain U.S. imports that meet domestic content and other requirements from designated countries in the Andean region. The purpose of ATPA is to promote economic growth in the Andean region and to encourage a shift away from dependence on illegal drugs by supporting legitimate economic activities. ATPA (Title II of P.L. 102-182) was enacted on December 4, 1991. It was renewed and modified under the Andean Trade Promotion and Drug Eradication Act (ATPDEA; Title XXXI of P.L. 107-210) on August 6, 2002, extending trade preferences until December 31, 2006. Since that time, Congress has provided several short-term extensions of ATPA. The most recent extension took place on October 12, 2011, when the 112th Congress enacted implementing legislation for the U.S.-Colombia Trade Promotion Agreement (P.L. 112-42). As part of the free trade agreement implementing legislation, ATPA was renewed for Colombia and Ecuador until July 31, 2013."
CRS Report for Congress, RS22548