Tenn. Code Ann. § 47-26-1103

Applicants must have available sufficient standards and equipment to adequately test devices as set forth in the “Notes” section of each applicable code in the most recent edition of NIST Handbook 44, “Specifications, Tolerances, and Other Technical Requirements for Weighing and Measuring Devices.” When applicable, this equipment must meet the specifications of National Institute of Standards and Technology Handbook 105-1, “Specifications and Tolerances for Reference Standards and Field Standard Weights and Measures, Specifications and Tolerances for Field Standard Weights (NIST Class F),” National Institute of Standards and Technology Handbook 105-2, “Specifications and Tolerances for Reference Standards and Field Standard Weights and Measures, Specifications and Tolerances for Field Standard Measuring Flasks,” or National Institute of Standards and Technology Handbook 105-3, “Specifications and Tolerances for Reference Standards and Field Standard Weights and Measures, Specifications and Tolerances for Graduated Neck Type Volumetric Field Standards” or other applicable handbooks, manuals, and technical papers published or referenced by NIST.