Tennessee Code Title 55. Motor and Other Vehicles § 55-8-189

(a) A person commits an offense who, on the streets of any municipality, roads of any county, or the highways of this state, transports a child under six (6) years of age in the bed of a truck with a manufacturer's ton rating not exceeding three-quarter ( 3/4 ) ton and having a pickup body style.

(c) This section does not apply to a person transporting a child in the bed of such vehicle when that vehicle is being used as part of an organized parade, procession, or other ceremonial event, and when that vehicle is not exceeding the speed of twenty miles per hour (20 mph).

(d) This section does not apply when the child being transported is involved in agricultural activities.

(e) A violation of subsection (a) or subdivision (b)(1) is a Class C misdemeanor.