Sec. 144.7. (a) For purposes of IC 13-18-12, "onsite residential sewage discharging disposal system" means a sewage disposal system that:
(1) is located on a site with and serves a one (1) or two (2) family residence; and
(2) discharges effluent offsite.
(b) The term includes a system that employs advanced treatment components not used in standard septic systems, such as a disinfection component that uses chlorine, ultraviolet light, or ozone, to reduce the concentration of the pathogenic constituents of the effluent to an acceptable level before the effluent is discharged.