The Cullen Law Firm assists its clients in all levels of regulatory law, from helping them participate in federal rulemaking to bringing legal challenges to federal rulemaking and other Agency challenges. The Firm has been involved in federal and state rulemaking at the U.S. Department of Transportation, The U.S. Department of Labor, the Federal Trade Commission, and the General Services Administration. Rulemaking subject areas have included hours-of-service (HOS) for truck drivers, electronic on-board record devices, driver training, the DataQs system, operating authority for Mexico-domiciled motor carriers to operate throughout the United States, employment histories under the Fair Credit Reporting Act (FCRA), out-of-service orders for fatigue, and General Services Administration (GSA) rules governing federal contractors.