R.I. Gen. Laws § 4-8-11: Applications for investigation.

If either party to the transaction of purchase and sale between a milk producer and a licensed buyer of milk is dissatisfied relative to any transaction of purchase and sale of milk between a milk producer and a licensed buyer of milk, he or she may apply to the director of environmental management, in writing, within thirty (30) days after the delivery of the milk to the licensed buyer, for investigation. The director shall treat the application as a complaint, and cause a full investigation of the transaction complained of to be made.