Subpart H—Split specimen tests
RegSenseMedical review officer (MRO) - Motor CarrierFleet SafetyCFR SubpartDrug and Alcohol Testing - DOTCFR RegulationsDrug testing - Motor CarrierOffice of the Secretary of TransportationTransportationSplit specimen - Motor CarrierDesignated employer representative (DER) - Motor CarrierEnglishFocus AreaUSA