Tennessee Code Title 60. Oil and Gas § 60-3-105

(a) The commissioner is authorized to examine and test, within this state, all oils and substances before the same are sold, offered for sale, used or stored in this state.

(b) It is the duty of all persons handling, transporting or storing oils or substances within this state to retain records or intelligible memoranda or books subject to inspection by an inspector covering the movements of the oils or substances in this state. The records shall be retained for a period of three (3) years following the end of the year in which the records were originated.

(c) The commissioner is authorized to examine and test all oils and substances for which there is a duty imposed upon the commissioner under this chapter, and also any products submitted to the commissioner, to determine whether the minimum standards imposed by § 60-3-103 are met and also to determine the value of such products for the purpose claimed.

(d) The commissioner shall make and publish rules necessary to effectuate an efficient and uniform system of inspection of oils and substances.

(e) The commissioner may prescribe standard minimum specifications for oils and substances and may promulgate rules for the uniform inspection of them. All tests shall conform to and be made under conditions and rules adopted by American Society for Testing Materials.

(f) The gravity, purity and test of oils and substances shall be determined in the manner and under the regulations as the commissioner may specify.

(g) The commissioner may purchase the apparatus for making chemical and physical tests of oils and substances, and may make any tests as are called for by this chapter, or as, in the judgment of the commissioner, are deemed essential for better enforcement and to afford full protection to the public.