20-9-408. Definition of forms of bonds. As used in this part, the following definitions apply:

(1) "Amortization bond" means that form of bond on which a part of the principal is required to be paid each time that interest becomes due and payable. The part payment of principal increases with each following installment in the same amount that the interest payment decreases, so that the combined amount payable on principal and interest is the same on each payment date. However, the payment on the initial interest payment date may be less or greater than the amount of other payments on the bond, reflecting the payment of interest only or the payment of interest for a period different from that between other interest payment dates. The final payment may vary from prior payments in amount as a result of rounding prior payments.

(2) "General obligation bonds" means bonds that pledge the full faith and credit and the taxing power of a school district.

(3) "Impact aid revenue bonds" means bonds that pledge and are payable solely from federal impact aid basic support payments received and deposited to the credit of the fund established in 20-9-514.

(4) "Oil and natural gas revenue bonds" means bonds that pledge and are payable from a first lien on oil and natural gas production taxes received by a school district pursuant to 20-9-310. Oil and natural gas revenue bonds to which a tax deficiency is pledged are not considered general obligation bonds that are eligible to receive guaranteed tax base aid pursuant to 20-9-367 but are to be considered in determining the debt limit of a school district for the purposes of 20-9-406.

(5) "Serial bonds" means a bond issue payable in annual installments of principal commencing not more than 2 years from the date of issue, any one installment consisting of one or more bonds, with the principal amount of bonds maturing or subject to mandatory sinking fund redemption in each installment, commencing with the installment payable in the fourth year after the date of issue, not exceeding three times the principal amount of the bonds payable in the immediately preceding installment.