Indiana Code Title 8. Utilities and Transportation § 8-1-42-16

Sec. 16. (a) Subject to subsection (b), and except as otherwise allowed by IC 36-7-4-1109, a project owner may not install or locate a CSE system in a unit unless the project owner demonstrates to the permit authority that the CSE system will operate in a manner such that the sound attributable to the CSE system will not exceed an hourly average sound level of fifty (50) A-weighted decibels, as modeled at the outer wall of a dwelling located on an adjacent nonparticipating property.

(b) The requirement set forth in subsection (a) may be waived with respect to any one (1) CSE system, subject to the written consent of the owner of each adjacent nonparticipating property.