If the amendment of the National Pollutant Discharge Elimination System (NPDES) general permit issued by the department for the purposes of IC 36-11 is necessary or advisable to enable county onsite waste management districts established under IC 36-11 after June 30, 2023, to function properly and effectively, the department shall amend the general permit as soon as reasonably possible after June 30, 2023.
IC 13-18-12-9.5