R.I. Gen. Laws § 34-47-1: Storage and liens.

Persons, including, but not limited to, the state government and any of its departments, commissions, divisions, agencies or branches thereof, maintaining public landing, parking, storage, and tie-down facilities for the landing, parking, storage, and tie-down of aircraft brought to their premises on an airport or placed in their care by or with the consent of the owners thereof, shall have a lien upon such aircraft for proper charges due them for the landing, parking, storage, and tie-down and care of the same.