Wyo. Stat. § 37-9-505: Two-way radios required; penalty.

(a) When a railroad train is operated in Wyoming with a caboose, it shall be equipped with operable, two-way radios located in the lead locomotive and in the caboose. The radios shall have and be operated at the same frequency as the control operator on the railroad on which the train is operated if the control operator is equipped with radios.

(b) When a railroad train is operated in Wyoming without a caboose, the train crews shall be supplied with an operable, portable two-way radio. The radio shall have and be operated at the same frequency as the control operator on the railroad on which the train is operated if the control operator is equipped with radios.

(c) Violation of this section is a misdemeanor punishable by a fine of not more than seven hundred fifty dollars ($750.00). Each train operating without the required radios is a separate violation.