New DOT Reminder Raises the Compliance Stakes for Return-to-Duty Decisions
Federal guidance highlights SAP oversight, follow-up testing controls, and documentation pitfalls that can disrupt driver return-to-work timelines
The U.S. Department of Transportation (DOT) is urging transportation employers and their service agents to tighten oversight of the return-to-duty (RTD) process after identifying recurring compliance problems that can affect whether safety-sensitive employees are properly cleared to return to work. Industry reporting this week noted DOT’s concern that procedural lapses in RTD programs could put RTD clearances at risk across modes, including motor carriers.
In a March 4, 2026 Federal Register notification (Document No. 2026-04337), DOT’s Office of Drug and Alcohol Policy and Compliance (ODAPC) reiterated that the Substance Abuse Professional (SAP) serves as the “gatekeeper” of the RTD process under 49 CFR Part 40, and that the Department is issuing the reminder in response to SAP/RTD issues it has “recently become aware of.” For motorcoach, charter, and bus company members—many of whom operate under FMCSA drug-and-alcohol testing requirements—this guidance is operationally significant because RTD timing and documentation can directly affect driver availability, onboarding, and audit readiness.
DOT’s notice underscores that when an employee tests positive, refuses a test, or otherwise violates DOT drug-and-alcohol rules, the employee must be immediately removed from safety-sensitive functions and cannot return until the SAP/RTD process is successfully completed. ODAPC also emphasized that SAP decisions can be a major decision point for employers determining whether to place someone back into a role “behind the steering wheel” of a bus, highlighting the public-safety stakes of getting the process right.
Among the problems DOT highlighted are patterns that can expose carriers to compliance risks even when third parties manage parts of the program. DOT cited situations in which employers struggled to obtain required follow-up testing plans, SAPs referred employees solely to online programs rather than determining what is appropriate for the individual, and SAPs were pressured to prescribe only the minimum follow-up testing. DOT also raised concerns about SAPs administering follow-up tests themselves, individuals acting as SAPs without proper credentials, and attempts to complete the RTD process in an unusually short timeframe to get employees back to work faster.
The Department’s message is especially relevant for operators that rely on a consortium/third-party administrator (C/TPA) model. DOT reiterated that assessments and evaluations must be conducted face-to-face (in-person or compliant remote format) and must be unique to each employee—and that it is “never appropriate” to provide an RTD timeline before completing the initial evaluation. DOT also warned against remote evaluations performed outside the SAP’s credentialed geographic scope or without real-time two-way audio and visual communication.
One point with immediate workflow implications for member companies involves confidentiality and document handling: DOT states SAPs must never give the employee a copy of the follow-up testing plan and should instruct the employer not to share it with the employee. Carriers may want to review internal practices (and vendor procedures) to ensure the follow-up plan is stored securely, access is limited, and required elements are maintained in the RTD file.
DOT also highlighted potential enforcement consequences for serious noncompliance, including conduct that may justify initiating a Public Interest Exclusion (PIE) proceeding against a service agent, such as providing SAP services without meeting SAP qualifications or falsely representing DOT approval or certification.
For motorcoach and charter operators, the reminder lands alongside broader RTD visibility through the FMCSA Drug and Alcohol Clearinghouse, which notes that drivers with violations are prohibited from operating commercial motor vehicles for DOT-regulated employers until the RTD process is completed. FMCSA also points out that, since Nov. 18, 2024, drivers with a “prohibited” Clearinghouse status can be denied or lose state-issued commercial driving privileges—raising the stakes for timely, correct RTD processing.
