From Wyoming Statues:

W.S.1977 § 31-5-913. Tail lamps

(a) A motor vehicle, multipurpose vehicle which is greater than fifty (50) inches in width, trailer, semitrailer, pole trailer or any other vehicle which is being drawn at the end of a combination of vehicles, shall be equipped with at least two (2) tail lamps mounted on the rear, which shall comply with the regulations of the superintendent. The superintendent may by regulation allow one (1) tail lamp on any vehicle equipped with only one (1) when it was made. A motorcycle, motor-driven cycle, multipurpose vehicle which is fifty (50) inches or less in width, autocycle or moped shall be equipped with at least one (1) tail lamp which shall comply with the regulations of the superintendent.

(b) Either a tail lamp or a separate lamp shall be so constructed and placed as to illuminate with a white light the rear registration plate of all vehicles listed in subsection (a) of this section. The lamp shall comply with the regulations of the superintendent.

(c) A street rod as defined in W.S. 31-1-101(a)(xv)(N) or a custom vehicle as defined in W.S. 31-1-101(a)(xv)(O) may use blue dot tail lights for stop lamps, rear turning indicator lamps, rear hazard lamps and rear reflectors. For purposes of this subsection, “blue dot tail light” means a red lamp installed in the rear of a motor vehicle containing a blue or purple insert that is not more than one (1) inch in diameter.

W.S.1977 § 31-13-105. Limitations on possession; presumption of abandonment; exceptions; expense of removal

(a) No person shall possess four (4) or more abandoned vehicles on his property or on property which is in his lawful possession or control, if any four (4) or more of the vehicles are visible from a highway for more than thirty (30) consecutive days.

(b) For purposes of this section a vehicle shall be presumed to be abandoned if it is in an inoperable condition and is not currently registered.

(c) This section shall not apply to:

      (i) Antique or historic motor vehicles as defined by W.S. 31-1-101(a)(xv)(A);

      (ii) Vehicles kept in an enclosed garage or storage building;

      (iii) Vehicles used for riprap on rivers, streams or reservoirs, or for erosion control;

      (iv) Persons licensed in accordance with W.S. 31-13-114; or

      (v) Vehicles used for educational or instructional purposes.

(d) A police officer may remove, or cause to be removed, any vehicle which has been abandoned under this section, at the expense of the person possessing the vehicle, to a place of impoundment designated by the county commissioners of the county in which the vehicle is impounded. Vehicles impounded under this section shall be disposed of in the manner provided by this act.

W.S.1977 § 31-5-925. Single-beam lamps

Head lamps which provide only a single distribution of light shall be permitted on all farm tractors regardless of date of manufacture, and on other motor vehicles manufactured and sold prior to July 1, 1956, if the head lamps comply with the regulations of the superintendent.