Ind. Code § 8-1-8.9-11
(a) Notwithstanding any other law, the commission may, in accordance with this chapter and IC 8-1-2-42.1 , issue a qualified order that:
(b) A qualified order issued under this section may not be:
(3) modified;
in such a manner that reduces or otherwise impairs the value of an SNG property interest.
As added by P.L.175-2007, SEC.21.