33 CFR § 64.21 - Marking and notification requirements.

---
identifier: "/us/cfr/t33/s64.21"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "33 CFR § 64.21 - Marking and notification requirements."
title_number: 33
title_name: "Navigation and Navigable Waters"
section_number: "64.21"
section_name: "Marking and notification requirements."
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: "2026-04-05"
last_updated: "2026-04-05"
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"
---


# 64.21 Marking and notification requirements.

Before establishing a structure, the owner or operator shall apply for Coast Guard authorization to mark the structure in accordance with § 66.01-5 of this chapter. The appropriate District Commander will determine the marking requirements.