Wyo. Stat. § 27-8-102: Termination and cost of license.

All licenses issued after this act takes effect shall terminate on the thirty-first day of December of each year, and shall be paid for at the rate per year established in this act; provided, however, that no license for any fractional part of the year shall be issued for any sum less than one-third of the full annual rate, and that fractional months shall be counted as full months in every case.