Sec. 22. (a) If the municipal legislative body decides that it is impracticable to raise the entire amount necessary to construct or acquire the utility solely by the issuance and sale of revenue bonds, the legislative body may, by ordinance, provide that a part of the amount may be raised by the issuance and sale of bonds pledging the general credit of the municipality.
(b) The bonds shall be issued in accordance with IC 6-1.1-20. The bonds may not exceed one-third (1/3) of the total cost of the utility. This limitation does not apply to a utility to be owned and operated by a municipality exclusively for the purpose of furnishing utility service to the municipality for its own municipal purposes.