47 C.F.R. § 80.411
Vessel certification or exemption
(a) [Reserved]
(b) Posting. Part II or III of Title III of the Communications Act, Safety Convention, and Great Lakes certificates or exemptions must be posted in a prominent, accessible place in the ship. Ships subject to subpart T of this part may, in lieu of a posted certificate, certify compliance in the station log required by § 80.409(f).