The FMCSA CDL Drug and Alcohol Clearinghouse retains records of drug and alcohol program violations. Employers of CMV operators are required to query the Clearinghouse annually, and before hiring new CDL drivers, to ensure drivers are not prohibited from operating a CMV. Keep your fleet running safely and protect everyone on our Nation’s roads—query the Clearinghouse records as required when you hire CDL drivers and at least once a year. To learn more, visit https://clearinghouse.fmcsa.dot.gov