Tennessee Code Title 4. State Government § 4-6-107

(a) The commissioner shall make rules for the prosecution of the commissioner's powers and may require the performance of additional duties by the officers of the penitentiaries named in § 4-6-102, so as to fully meet the requirements, intents and purposes of this chapter, and particularly those relating to the making of estimates and furnishing proper proof of the use made of all articles furnished or produced at such penitentiaries.

(b) In case of an apparent conflict between the powers conferred by law upon any warden or superintendent and those conferred by this chapter, upon the commissioner, the presumption shall be conclusive in favor of the commissioner.