Guidanceguidance
PHMSA CRM HOS
Control Room Hours-of-Service
Current as of source date Government source
RegulusPipeline researchRegulusPipeline researchPHMSA CRM HOS
The fatigue mitigation provisions in 49 CFR 192.631(d)(4) and 195.446(d)(4) allow emergency deviation from maximum controller hours-of-service when necessary for safe operation. Operators do not need to notify PHMSA solely because a controller exceeds hours-of-service, but must document the deviation. Additional fatigue risks must be addressed through the operator's fatigue mitigation program and available countermeasures should be used during extraordinary conditions.
This material provides agency context. It does not replace binding regulatory text, and its legal effect depends on the underlying authority and facts.