CFR›Title 33›Chapter I›Part 64 ContainsSubparts A–DCorpusDaily eCFRDisplayed edition2026-04-27Last updated2026-04-27 PART 64—MARKING OF STRUCTURES, SUNKEN VESSELS AND OTHER OBSTRUCTIONS Subparts A Subpart A—General Sections 64.01–64.06 B Subpart B—Sunken Vessels and Other Obstructions Sections 64.11–64.16 C Subpart C—Structures Sections 64.21–64.23 D Subpart D—Miscellaneous Provisions Sections 64.31–64.33 Authority14 U.S.C. 503; 33 U.S.C. 409; 42 U.S.C. 9118; 43 U.S.C. 1333; 46 U.S.C. 70034; Department of Homeland Security Delegation No. 0170.1.SourceCGD 78-156, 48 FR 11267, Mar. 17, 1983, unless otherwise noted. Previous 62 Part 62—United States Aids to Navigation System Next 66 Part 66—Private Aids to Navigation