Wyo. Stat. § 41-13-103 (2026)

(a) A motorboat shall not be required to be numbered under
this act if it is:

          (i) Already covered by a number in full force and
effect which has been awarded to it pursuant to federal law or a
federally approved numbering system of another state. Provided,
that such boat shall not have been within this state for a
period in excess of ninety (90) consecutive days;

          (ii) Presently numbered under the rules of the
department until the present registration expires and provided
further, that present coast guard numbers shall be specifically
recognized for their duration or until the certificate expires,
whichever is first;

          (iii) A motorboat whose owner is the United States, a
state or a subdivision thereof, but such ownership must be
visibly evident;

          (iv) A motorboat belonging to a class of boats which
has been exempted from numbering by the department after said
agency has found that the numbering of motorboats of such class
will not materially aid in their identification; and, if an
agency of the federal government has a numbering system
applicable to the class of motorboats to which the motorboat in
question belongs, after the department has further found that
the motorboat would also be exempt from numbering if it were
subject to the federal law.