CFR›Title 48›Chapter 1›Part 15›Subpart 15.5›48 CFR 15.501 Citation48 CFR 15.501CorpusDaily eCFRDisplayed edition2026-09-01Last updated2026-09-01 15.501 Definition.Day, as used in this subpart, has the meaning set forth at 33.101. Next 15.502 15.502 Applicability.