33 CFR § 64.23 - Duration of marking on structures.

---
identifier: "/us/cfr/t33/s64.23"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "33 CFR § 64.23 - Duration of marking on structures."
title_number: 33
title_name: "Navigation and Navigable Waters"
section_number: "64.23"
section_name: "Duration of marking on structures."
chapter_name: "COAST GUARD, DEPARTMENT OF HOMELAND SECURITY"
subchapter_number: "C"
subchapter_name: "AIDS TO NAVIGATION"
part_number: "64"
part_name: "MARKING OF STRUCTURES, SUNKEN VESSELS AND OTHER OBSTRUCTIONS"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "14 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."
regulatory_source: "CGD 78-156, 48 FR 11267, Mar. 17, 1983, unless otherwise noted."
cfr_part: "64"
---


# 64.23 Duration of marking on structures.

Markings determined to be required shall be established and maintained until:

(a) The structure is removed; or

(b) Otherwise directed by the District Commander.