CFR›Title 29›Subtitle B›Chapter XL›Part 4000›Subpart D ContainsSections 4000.41–4000.43CorpusDaily eCFRDisplayed edition2026-06-12Last updated2026-06-12 Subpart D—Computation of Time Sections 4000.41 § 4000.41 What are these computation-of-time rules about? 4000.42 § 4000.42 What definitions do I need to know for these rules? 4000.43 § 4000.43 How do I compute a time period? Previous C Subpart C—Determining Filing and Issuance Dates Next E Subpart E—Electronic Means of Record Retention