33 C.F.R. § 175.128
Marking
No person may use a boat unless each signal required by § 175.110 is legibly marked with the approval number or certification statement as specified in 46 CFR parts 160 and 161.
No person may use a boat unless each signal required by § 175.110 is legibly marked with the approval number or certification statement as specified in 46 CFR parts 160 and 161.