33 C.F.R. § 175.125
Serviceability
No person may use a boat unless each signal required by § 175.110 is in serviceable condition and the service life of the signal, if indicated by a date marked on the signal, has not expired.
No person may use a boat unless each signal required by § 175.110 is in serviceable condition and the service life of the signal, if indicated by a date marked on the signal, has not expired.