CFR›Title 5›Chapter I›Part 551›Subpart D›Subject Group Special Situations ContainsSections 551.431–551.432CorpusDaily eCFRDisplayed edition2026-04-15Last updated2026-04-15 Sections 551.431 § 551.431 Time spent on standby duty or in an on-call status. 551.432 § 551.432 Sleep time. Previous General Provisions General Provisions