Tennessee Code Title 55. Motor and Other Vehicles § 55-16-112

(a) Notwithstanding any other provision of this part or of title 66, chapter 19, part 1, in order for a garagekeeper or a towing firm to tow or to store a vehicle the garagekeeper or towing firm shall obtain an express written authorization for towing and storage of each vehicle from a law enforcement officer with appropriate jurisdiction, or from the owner of the vehicle, or from the owner, or the authorized agent of the owner, of the private property from which the vehicle is to be towed. The authorization shall include all of the information required by § 66-19-103(d). In addition to any other penalty provided by this part or by title 66, chapter 19, part 1, a violation of this section is a Class C misdemeanor.

(b) This section and § 66-19-103(a) do not apply to new or used motor vehicle dealers licensed under chapter 17 of this title.