Wyo. Stat. § 41-13-102 (2026)

(a) Except as provided by W.S. 41-13-103, all motorboats
powered by propulsion machinery of any type and operated on the
waters of this state shall be numbered.

     (b) No person shall operate nor shall the owner permit the
operation of any motorboat unless:

          (i) The motorboat is numbered in accordance with this
act, applicable federal law or a federally approved numbering
system of another state;

          (ii) The certificate of number issued for the
motorboat is in full force and effect; and
          (iii) The identifying number set forth in the
certificate of number is displayed on each side of the bow of
the motorboat.