Indiana Code Title 8. Utilities and Transportation § 8-2.1-18.5-2

Sec. 2. A motor carrier or a party representing a motor carrier may not add to a charge or attempt to add to a charge for a transportation service previously provided, the difference between:

if payment for the transportation service was received by the motor carrier or its representative at least ninety (90) days before the motor carrier's attempt to add to the rate, fare, or charge.