Tennessee Code Title 55. Motor and Other Vehicles § 55-9-604

(a) The failure to wear a safety belt or receipt of a citation or warrant for arrest for failure to wear a safety belt shall not be admissible into evidence in a civil action; provided, that evidence of a failure to wear a safety belt or receipt of a citation or warrant for arrest for failure to wear a safety belt, as required by this chapter, may be admitted in a civil action as to the causal relationship between noncompliance and the injuries alleged, if the following conditions have been satisfied:

(b) Upon request of any party, the trial judge shall hold a hearing out of the presence of the jury as to the admissibility of the evidence in accordance with this section and the Tennessee Rules of Evidence.