(a) An issuer may issue bonds, payable from revenues of the issuer, to finance or refinance the cost of acquiring, constructing, or improving a system.
(b) The bonds may be issued in more than one series and from time to time as required to carry out the purposes of this chapter.
(c) The issuer may declare an emergency because funds are not available to pay the principal of and interest on its bonds or to meet other needs of the issuer and may issue bond anticipation notes to borrow the needed money. The bond anticipation notes may bear interest at any fixed, floating, or other type of rate, and must mature within one year of their date. The bond anticipation notes shall be paid with the proceeds of bonds, or bonds may be issued and delivered in exchange for and in substitution of the notes.