Ind. Code § 16-41-25-5
(b) If a professional engineer registered under IC 25-31-1 certifies that the:
(4) proposed installation;
of a planned residential onsite sewage system comply with the administrative rule of the state department concerning residential onsite sewage systems, a local health department may not disapprove an application for a permit for the residential onsite sewage system on the grounds that the location, design, construction, or installation of the residential onsite sewage system is faulty.
(c) If a professional engineer registered under IC 25-31-1 certifies that the:
(6) operation;
of an existing residential onsite sewage system comply with the administrative rule of the state department concerning residential onsite sewage systems, a local health department may not issue an order based on a finding that the residential onsite sewage system is a failed system.
As added by P.L.167-2022, SEC.10.