Wyo. Stat. § 31-18-203 (2026)

(a)     As used in W.S. 31-18-203 through 31-18-208:

          (i) "Mobile machinery" means heavy equipment, except
shop or hand tools or attachments, which is self-propelled,
towed or hauled and used primarily in construction and
maintenance of roads, bridges, ditches, buildings or land
reclamation;

            (ii)   The definitions in W.S. 31-1-101 apply in this
division;

          (iii)    "This division" means W.S. 31-18-203 through
31-18-208.

     (b) Except as provided in W.S. 31-18-204, no mobile
machinery shall be operated in this state, whether or not upon
the public highways of this state, unless registered under this
division. Prior to using any mobile machinery on any
construction project receiving state funds, the contractor shall
provide certification to the public agency or engineer in charge
of the project that the mobile machinery has been registered as
required by this division.
     (c) Notwithstanding subsection (b) of this section, mobile
machinery listed on a property tax assessment roll in this state
is exempt from the registration requirement of this division.
Each county treasurer shall issue stickers pursuant to this
division to owners of mobile machinery listed on a property tax
assessment roll in this state upon receipt of an application by
the owner and payment of an administrative fee of six dollars
($6.00).