As used in this part, unless the context otherwise requires:
(1) “Certified public weigher” means a natural person licensed under this part;
(2) “Commissioner” means the commissioner of agriculture or the commissioner's duly appointed representative;
(3) “Department” means the Tennessee department of agriculture;
(4) “Natural resources product” means crushed stone, sand, gravel, cement, and asphalt related to highway construction and/or other construction projects or construction purposes, so long as materials are produced at a central location for commercial or highway use, and are measured by ton, cubic yard, or metric weights;
(5) “Producer and supplier” means any individual, firm, partnership, corporation, company, association, or governmental entity which engages in the production and/or sale of natural resources products;
(6) “Seal” means and includes the certified weigher's name, the words “Tennessee Certified Weigher” and the weigher's license number, which can be affixed either manually (by a rubber stamp or with an imprinting type stamp) or electronically; and
(7) “Signature” means the certified weigher's written name, which can be generated manually or electronically.