CFR›Title 43›Subtitle B›Chapter II›Part 3590›Subpart 3593 ContainsSection 3593.1CorpusDaily eCFRDisplayed edition2026-05-12Last updated2026-05-12 Subpart 3593—Bore Holes and Samples Sections 3593.1 § 3593.1 Core or test hole cores, samples, cuttings. Previous 3592 Subpart 3592—Plans and Maps Next 3594 Subpart 3594—Mining Methods