Tennessee law provides that it is illegal for children under the age of 6 to ride in the bed of 3/4 quarter ton or less pick-up trucks while the trucks are being operated on any local, county or state road.
Exceptions are made for parades and similar events if the speed of the truck is less than twenty miles per hour and when the child is in the truck bed in connection with agricultural activities.
Tennessee counties are given the express right to enact ordinances to raise the age limit from 6 years of age to 12.
Tennessee Injury Law Center

