Tennessee Code Title 55. Motor and Other Vehicles § 55-10-803

(a) It is an offense for a person responsible for a child younger than seven (7) years of age to knowingly leave that child in a motor vehicle located on public property or while on the premises of any shopping center, trailer park, or any apartment house complex, or any other premises that is generally frequented by the public at large without being supervised in the motor vehicle by a person who is at least thirteen (13) years of age, if:

(b) A violation of this section is a Class B misdemeanor punishable only by a fine of two hundred dollars ($200) for the first offense.

(c) A second or subsequent violation of this section is a Class B misdemeanor punishable only by a fine of five hundred dollars ($500).