Wyo. Stat. Ann. § 35-10-205

This act shall not be construed to prohibit the imposition by municipal ordinance of further regulations or prohibitions upon the sale, use and possession of fireworks within the corporate limits of any city or town, including those items defined under 15 U.S.C. § 1261, but no such city or town shall permit or authorize the sale, use or possession of any fireworks in violation of this act.