Bonds issued under this chapter must mature serially or otherwise not more than 40 years after they are issued. The bonds may:
(1) bear interest at a rate and be sold at a price or under terms that the governing body of the issuer determines to be the most advantageous reasonably obtainable;
(2) be made callable before maturity at times and prices prescribed in the resolution authorizing the bonds;
(3) be in coupon form; and
(4) be registrable as to principal or as to principal and interest.