The Treasury Department’s Office of Foreign Assets Control (“OFAC”) administers and enforces economic sanctions imposed by the United States against foreign countries. These sanctions may require obtaining OFAC approval before conducting research or other activities in or involving the sanctioned country. Some sanctions regimes are more restrictive than others, and apply to the whole country, while other regimes are more targeted against certain individuals or entities in a country. Currently, sanctioned countries include the following (most restrictive sanctions regimes are in bold)