Each VTS User shall carry on board and maintain for ready reference a copy of these rules.
33 C.F.R. §161.4
Note 1 to § 161.4 : These rules are contained in the applicable U.S. Coast Pilot, the VTS User's Manual which may be obtained by contacting the appropriate VTS or downloaded from the Coast Guard Navigation Center website ( https://www.navcen.uscg.gov ).