Indiana Code Title 34. Civil Law and Procedure § 34-30-35-5

Sec. 5. (a) Except as provided in subsection (b):

is not civilly liable for a claim asserting that the person described in subdivisions (1) through (2) has an obligation or duty to install or equip optional equipment on a commercial motor vehicle.

(b) The immunity described in subsection (a) does not apply if the person described in subsection (a)(1) or (a)(2) fails to comply with a law, rule, or regulation issued after the commercial motor vehicle involved in an accident was manufactured or first sold that requires a mandatory retrofit or recall of the commercial motor vehicle to install or equip optional equipment.