33 CFR 174.23
§ 174.23 Form of number.
United States · 33 CFR — Navigation and Navigable Waters · Status: effective
Cite this
- Citation
- 33 CFR 174.23, § 174.23 Form of number, United States, version 1 as recorded 2026-07-09, yourstate.us, https://yourstate.us/provision/153200
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Full text
(a) Each number must consist of two capital letters denoting the State of the issuing authority, as specified in appendix A of part 173 of this chapter, followed by—
(1) Not more than four numerals followed by not more than two capital letters (example: NH 1234 BD); or
(2) Not more than three numerals followed by not more than three capital letters (example: WN 567 EFG).
(b) A number suffix must not include the letters “I”, “O”, or “Q,” which may be mistaken for numerals.
Legislative history
This is a federal regulation, adopted through agency rulemaking under the Administrative Procedure Act — not enacted by a recorded vote of Congress.