Indiana Code Title 13. Environment § 13-26-5-2.6

(1) the property is located on at least ten (10) acres;

(2) the owner can demonstrate the availability of at least two (2) areas on the property for the collection and treatment of sewage that will protect human health and the environment;

(3) the waste stream from the property is limited to domestic sewage from a residence or business;

(4) the system used to collect and treat the domestic sewage has a maximum design flow of seven hundred fifty (750) gallons per day;  and

(5) the owner, at the owner's expense, obtains and provides to the district a certification from the local health department or the department's designee that the system is functioning satisfactorily.