Wyo. Stat. § 15-7-104
A city or town may borrow money and issue the coupon bonds in an amount not exceeding at one (1) time, four percent (4%) of the assessed valuation of the city or town to acquire and purchase supplies, equipment and apparatus for fire prevention and control and to erect, construct or purchase buildings for housing its fire extinguishing equipment and for the use of its fire department in the transaction of its official business. The bonds shall bear interest payable semiannually, be of the denomination and be payable at a rate, at a place and in the manner the governing body provides. The bonds shall be redeemable after ten (10) years and payable in not more than thirty (30) years after the time they are issued or payable serially, as provided in W.S. 16-5-302.
W.S. 15-7-104