Tennessee Code Title 41. Correctional Institutions and Inmates § 41-1-115

(a) The warden or superintendent of each state penal or correctional institution shall post in a conspicuous place in the institution and shall keep up to date a list of the names of guards, employees and other persons authorized to have in their possession while upon the grounds of the institution any of the contraband items listed in § 39-16-201(b)(1), together with a complete description of the item or items the persons are authorized to have in their possession.

(b) When and if the warden or superintendent authorizes any person not on the posted list to have possession, while upon the grounds of the institution, of any contraband item listed in § 39-16-201(b)(1), the superintendent shall provide the person with written authorization.