Here is UT's law:
73-18-8.1. Capacity and certification label.
(1) Each vessel manufactured after November 1, 1972, which is less than 20 feet in
length, except a sailboat, canoe, kayak, inflatable vessel, or homemade motorboat
must have a United States Coast Guard capacity and certification label permanently
affixed to the vessel and clearly visible to the operator when boarding or operating the
vessel. The capacity and certification information may be combined together and
displayed on one label.
(2) No person shall operate, or give permission for the operation of, any vessel on the
waters of this state if it is loaded or powered in excess of the maximum capacity
information on the United States Coast Guard capacity label.
(3) No person shall alter, deface, or remove any United States Coast Guard capacity
or certification information label affixed to a vessel.
(4) No person shall operate, or give permission for the operation of, a vessel on the
waters of this state if the required United States Coast Guard capacity or certification
information label has been altered, defaced, or removed.
What I get from this, you could also argue that your boat is >20 feet and this plate is not even required. http://stateparks.utah.gov/boating