Sec. 17. If the commission disapproves all or part of the implementation of the part of the environmental compliance plan under review:
(1) the commission may, consistent with section 9 of this chapter, issue an order withdrawing the commission approval of all or part of the environmental compliance plan; and
(2) the public utility may voluntarily submit a modified environmental compliance plan to the commission for the commission's approval under this chapter.
If the commission issues an order approving all or part of the modified environmental compliance plan, the environmental compliance plan constitutes the public utility's approved environmental compliance plan to the extent of the approval for purposes of this chapter.