Wyo. Stat. Ann. § 21-17-419

The board may provide for the redemption of any or all of the bonds or other securities prior to maturity, in such order, by lot or otherwise, at such time or times, without or with the payment of the premium or premiums not exceeding ten percent (10%) of the principal amount of each bond or other security so redeemed, and otherwise upon such terms as may be provided by the board in the resolution authorizing the issuance of the securities or other instrument appertaining thereto.