Utah Code § 10-7-9
The board of commissioners, city council or board of trustees as the case may be shall provide by ordinance for the issuance and disposal of such bonds; provided, that no such bonds shall be sold for less than their face value. The board of commissioners, city council or board of trustees shall annually levy on all taxable property within the boundaries of the issuer a sufficient tax to pay the interest on such indebtedness as it falls due, and also to constitute a sinking fund for the payment of the principal thereof within the time for which such bonds are issued which levy shall be made without regard to any statutory limitation on the taxing power of such issuer which may now exist or, unless an express contrary provision appears in the statute, which may hereafter be enacted by the legislature; provided, that whenever bonds shall have been issued for the purpose of supplying any city or town with artificial light, water or other public utility the rates or charges for the service of the system or plant so constructed may be made sufficient to meet such payments, in addition to operating and maintenance expenses, and taxes shall be levied to meet any deficiencies. Water or sewer bonds may be issued for a period not exceeding 40 years; other bonds may be issued for a period not exceeding 20 years. Such bonds may be either serial or term bonds.
Utah Code § 10-7-9