Wyo. Stat. § 41-10-137
All monies received from the issuance of any bonds herein authorized shall be used solely for the purpose (or purposes) for which issued, including, without limiting the generality of the foregoing, if so authorized the payment of preliminary expenses; provided, however, that any unexpended balance of such bond proceeds remaining after the completion of the acquisition or improvement of the project or service for which such bonds were issued shall be paid immediately into the fund created for the payment of the principal of said bonds and shall be used therefor. The validity of said bonds shall not be dependent on nor affected by the validity or regularity of any proceedings relating to the acquisition or improvement of the project for which the bonds are issued; and the purchaser or purchasers of the bonds shall in no manner be responsible for the application of the proceeds of the bonds by the district or any of its officers, agents and employees.
W.S. 41-10-137