Wyo. Stat. Ann. § 27-4-413

The provisions of W.S. 27-4-401 through 27-4-413, are not applicable where in conflict with federal statutes, rules or regulations relating to prevailing wage determinations. All work and labor performed by prisoners, patients and other inmates of state penal, correctional and charitable institutions and city or county jails, are exempt from the provisions of this act. All work and labor performed by workmen regularly employed by the public body are exempt from the provisions of W.S. 27-4-401 through 27-4-413 if the cost of construction does not exceed twenty-five thousand dollars ($25,000.00).