Wyo. Stat. § 16-5-301: Voidness of excessive indebtedness; liability of officer and sureties.

Any indebtedness created by any county, city, town or other subdivision of the state in any current year in excess of that authorized by the constitution of the state and for which there are no revenues available for payment during the current year, shall as against the county, city, town or other subdivision of the state, be void and of no effect. Any officer who participates in creating the indebtedness, and the sureties on his official bond, is personally liable to the holder, or holders, of the indebtedness as fully as if the indebtedness had been contracted for his individual benefit. As used in this section, "current year" means from the first Monday in January of a year to the first Monday in January of the next year.