49 CFR Part 40, or Part 40 as we call it, is a DOT-wide regulation that states how to conduct testing and how to return employees to safety-sensitive duties after they violate a DOT drug and alcohol regulation. Part 40 applies to all DOT-required testing, regardless of mode of transportation. The regulations also impose privacy protections and restrictions on employers and service agents against the use and release of sensitive drug and alcohol testing information. This policy helps you satisfy Part 40 and follow compliance set for in Part 382.