U.S. Code of Federal Regulations

Regulations most recently checked for updates: Jan 21, 2026

All TitlesTitle 5Chapter IPart 551Subpart D - Subpart D—Hours of Work

GENERAL PROVISIONS
§ 551.401 - Basic principles.
§ 551.402 - Agency responsibility.

APPLICATION OF PRINCIPLES IN RELATION TO NORMAL WORKDAY
§ 551.411 - Workday.
§ 551.412 - Preparatory or concluding activities.

APPLICATION OF PRINCIPLES IN RELATION TO OTHER ACTIVITIES
§ 551.421 - Regular working hours.
§ 551.422 - Time spent traveling.
§ 551.423 - Time spent in training or attending a lecture, meeting, or conference.
§ 551.424 - Time spent adjusting grievances or performing representational functions.
§ 551.425 - Time spent receiving medical attention.
§ 551.426 - Time spent in charitable activities.

SPECIAL SITUATIONS
§ 551.431 - Time spent on standby duty or in an on-call status.
§ 551.432 - Sleep time.
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