Indiana does not issue a state septic installer license. An installer registers with the
county, and the statute is built around that register rather than around a state credential —
which means the counter you go to in the general case is the county where the work is performed.
What Indiana adds on top is unusual enough to be worth knowing before you price a job across
county lines: a registration held in one Indiana county, together with certification and good
standing with the association the statute names, carries the installer into the others. That is
a statewide entitlement written into the statute, not a courtesy between counties.
The direction of local authority is the part most often written backwards. Indiana reversed its
posture: rather than letting every county layer requirements on top, the statute now limits what
a county, city or town ordinance may require about the design, construction, installation and
location of these systems. It is a ceiling, not a floor: no local ordinance may now adopt technical
requirements more stringent than the state department’s rule, although the county installer register
itself survives the change.
None of that is an insurance requirement, and that is the point.
The credential question and the
coverage question are separate, and the sections below set out each one with the authority it
rests on, so you can check it rather than take our word for it.