R.I. Gen. Laws § 39-12.1-6: Possessory lien.

Any certificated tower coming into possession of a vehicle in any lawful manner shall have a possessory lien on the vehicle and registration plates, so long as it retains possession, and if it has conformed in full with the provisions of §§ 39-12.1-4 and 39-12.1-8. The lien shall be in an amount in accordance with its published tariff.