Wyo. Stat. § 37-9-408
It shall be the duty of the owner or owners of railroads, or other public conveyances, to provide for the redemption of the whole or any parts, or coupons of any ticket or tickets, as they may have sold, as the purchaser for any reason has not used and does not desire to use, at a rate which shall be equal to the difference between the price paid for the whole ticket and the cost of a ticket between the points for which the proportion of said ticket was actually used; and the sale by any person of the unused portion of any ticket otherwise than by the presentation of the same for redemption, as provided for in this section, shall be deemed to be a violation of the provisions of this act, and shall be punished as hereinbefore provided; provided, that this act shall not apply to the sale of first-class tickets; and provided, that this act shall not prohibit any person who has purchased a regular first-class ticket from any agent authorized by this act with the bona fide intention of traveling upon the same the whole distance between the points named in the said ticket, from selling the unused part of the same to any other person, if such person travels upon the same, unless said tickets shall be special contract tickets and the local fare to the point to which said ticket may be used shall equal the price paid for such special contract ticket.
W.S. 37-9-408