(1) “Commercial and law enforcement weighing and measuring device” is construed to include any weight or measure or weighing or measuring device commercially used or employed in establishing the size, quantity, extent, area, or measurement of quantities, things, produce, or articles for distribution or consumption, purchased, offered, or submitted for sale, hire, or award, or in computing any basic charge or payment for service rendered on the basis of weight, measure, or count. It shall also include any accessory attached to or used in connection with a commercial weighing or measuring device when such accessory is so designed or installed that its operation affects the accuracy of the device. It also includes weighing and measuring equipment in official use for the enforcement of laws or for the collection of statistical information by governmental agencies;

(2) “Commissioner” means the commissioner of agriculture or the commissioner's duly appointed representative;

(3) “Department” means the Tennessee department of agriculture;

(4) “Handbook 44” means National Institute of Standards and Technology Handbook 44, “Specifications, Tolerances, and Other Technical Requirements for Weighing and Measuring Devices”;

(5) “NIST” means the National Institute of Standards and Technology which is an agency of the United States department of commerce;

(6) “Registered service agency” shall be construed to mean any agency, firm, company, or corporation employing more than two (2) registered servicepersons that for hire, award, commission, or any other payment of any kind installs, services, repairs, or reconditions a commercial weighing or measuring device, and that registers itself as such with the commissioner. Under agency registration, identification of individual servicepersons shall be required; and

(7) “Registered serviceperson” shall be construed to mean any individual who for hire, award, commission, or any other payment of any kind, installs, services, repairs, or reconditions a commercial weighing or measuring device, and who applies for registration with the commissioner.