CRS – Legal Definitions: A Research Guide for Congressional Staff Updated June 6, 2024; ‘This report is designed to introduce congressional staff to examples of legal and nonlegal sources, including statutes, legislation, and dictionaries, for researching legal definitions. It includes governmental sources, such as the United States Code (U.S. Code), the Code of Federal Regulations (C.F.R.), and congressional legislation. Proprietary information sources are also included.”