Tennessee Code Title 71. Welfare § 71-3-1205

(1) Testing procedures established by the United States departments of health and human services and transportation;

(2) Screening procedures established by substance abuse experts to determine that a person exhibits the criteria to determine that there is reasonable cause to suspect that a person is likely to use drugs as defined in this part;

(3) Body specimens and minimum specimen amounts that are appropriate for drug testing;

(4) Methods of analysis and procedures to ensure reliable drug testing results, including standards for initial tests and confirmation tests;

(5) Minimum cut-off detection levels for each drug or metabolites of the drug for the purposes of determining a positive test result;

(6) Chain-of-custody procedures to ensure proper identification, labeling and handling of specimens tested; and

(7) Retention, storage and transportation procedures to ensure reliable results of drug tests used in the administration of this part.