§174.23. Form of number.
33 C.F.R. § 174.23
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—
Not more than four numerals followed by not more than two capital letters (example— NH 1234 BD); or
Not more than three numerals followed by not more than three capital letters (example— WN 567 EFG).
A number suffix must not include the letters “I”, “O”, or “Q,” which may be mistaken for numerals.
Notes, amendments, and revision history
Authority
Authority: 46 U.S.C. 6101 and 12302; DHS Delegation No. 00170.1, Revision No. 01.4.
Source
Source: CGD 72-54R, 37 FR 21402, Oct. 7, 1972, unless otherwise noted.