From the Document: "On October 18, 2019, the United States imposed additional tariffs on $7.5 billion worth of U.S. imports from the European Union (EU). The action, authorized by World Trade Organization (WTO) dispute settlement procedures, followed an investigation by the U.S. Trade Representative (USTR), under Section 301 of the Trade Act of 1974. The USTR determined that the EU had denied U.S. rights under WTO agreements. Specifically, the USTR concluded that the EU and certain member states had not complied with a WTO Dispute Settlement Body (DSB) ruling recommending the withdrawal of WTO-inconsistent subsidies on the manufacture of large civil aircraft. In 2011, the DSB confirmed that these subsidies breached the EU's WTO obligations under the 1994 General Agreement on Tariffs and Trade (GATT) and the Agreement on Subsidies and Countervailing Measures (SCM Agreement)."
CRS In Focus, IF11364
Congressional Research Service: https://crsreports.congress.gov/