The final rule from the Federal Railroad Administration (FRA) expands the scope of 49 CFR Part 219 drug and alcohol testing requirement to include mechanical (MECH) employees. As mandated by the Substance Use-Disorder Prevention that Promotes Opioid Recovery and Treatment for Patients and Communities Act (SUPPORT Act or Act), this rule clarifies who the FRA considers a mechanical employee for regulatory purposes and is effective March 4, 2022.