Sec. 13. (a) The bonds of the district are:
(1) a valid claim of the holders only against the bond and interest redemption account and the revenues of the storm water system; and
(2) exempt from taxation in Indiana as provided by IC 6-8-5.
(b) The bonds may be issued either as registered bonds or as coupon bonds payable to the bearer.
(c) Except as provided in this chapter or IC 5-1-5, bonds shall be sold in accordance with IC 5-1-11. The registration of bonds does not affect negotiability.