(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.
authority: 46 U.S.C. 6101 and 12302; DHS Delegation No. 00170.1, Revision No. 01.4
source: CGD 72-54R, 37 FR 21402, Oct. 7, 1972, unless otherwise noted.
cite as: 33 CFR 174.23