"U.S. economic sanctions imposed on North Korea are instigated by that country's activities related to weapons proliferation; regional disruptions; terrorism; narcotics trafficking; undemocratic governance; and illicit activities in international markets, including money laundering, counterfeiting of goods and currency, and bulk cash smuggling. [...] This report presents the legislative basis for U.S. sanctions policy toward North Korea. These sanctions are a critical tenet of the larger bilateral relationship, and this report highlights Congress's role and responsibility in determining the nature of U.S.-North Korea relations."
CRS Report for Congress, R41438
Federation of American Scientists: http://www.fas.org/sgp/crs/index.html