Sec. 5. (a) Except as provided in subsection (b):
(1) an owner, lessor, or operator of a commercial motor vehicle; or
(2) a person renting or leasing the commercial motor vehicle to another person;
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.