Indiana Code Title 8. Utilities and Transportation § 8-1.5-5-25

Sec. 25. (a) Revenues received by the department may be used to pay for bonds issued to acquire, construct, install, operate, and maintain facilities and land for storm water collection and disposal systems.

(b) If there are bonds outstanding for which user fees were pledged, the board may not rescind user fees or reduce them below a rate that would produce one hundred twenty-five percent (125%) of the highest annual debt service on the bonds issued under this chapter to their final maturity, based on an average of the immediately preceding three (3) years of user fee collections, if the user fees have been levied for the preceding three (3) years.  If the user fees have not been levied for the preceding three (3) years, the board may not reduce user fees below a rate that would produce one hundred twenty-five percent (125%) of the highest debt service, based upon a study by a qualified public accountant or financial adviser.