1. (a) If:

   1. (1) a discharge results from an activity for which:

      1. (A) an NPDES permit subject to IC 13-15-4-1 (a)(2)(B), IC 13-15-4-1 (a)(3)(B), or IC 13-15-4-1 (a)(4); or

      2. (B) a modification or renewal of a permit referred to in one (1) of the sections referred to in clause (A);

         is sought; and

   2. (2) the permit application or application to modify or renew the permit proposes a new or increased discharge that would result in a significant lowering of water quality as defined in IC 13-18-3-2 (l)(1);

      the deadline for the department to complete the antidegradation review under 40 CFR 131.12 and 40 CFR Part 132, Appendix E with respect to the discharge is the deadline for the commissioner to approve or deny the NPDES permit application under IC 13-15-4-1 .

2. (b) The commissioner may extend for cause for not more than ninety
3. (90) days the deadline under subsection (a) for the department to complete the antidegradation review.

As added by P.L.78-2009, SEC.16. Amended by P.L.112-2016, SEC.18; P.L.85-2017, SEC.67.