No driver shall perform safety-sensitive functions within four hours after using alcohol. No employer having actual knowledge that a driver has used alcohol within four hours shall permit a driver to perform or continue to perform safety-sensitive functions.
Reproduced verbatim from the electronic Code of Federal Regulations (eCFR), the official U.S. government source. X3 Fleet Safety LLC is a compliance-services company, not a law firm; this page is regulatory reference, not legal advice. X3 is not affiliated with FMCSA or USDOT.