Sec. 16. If the commission issues an order under sections 8, 11, or 18 of this chapter that approves modifications to a public utility's environmental compliance plan, the commission shall, absent fraud, concealment, gross mismanagement, or inadequate quality control, allow the public utility to recover under sections 12(a) and 12(b) of this chapter, to the extent permitted under sections 12(a) and 12(b) of this chapter, the following:
(1) The public utility's expenditures made under the environmental compliance plan before the date the commission issued the order approving the modified environmental compliance plan.
(2) The public utility's expenditures made under the modified environmental compliance plan after the date the commission issued the order approving the modified environmental compliance plan.