Tenn. Code Ann. § 44-7-401

In order to promote and further develop livestock interests of this state, the commissioner, or the commissioner's authorized agents, is authorized, when requested by parties financially interested in livestock or livestock products, to investigate and certify the quality, condition, grade or other classification of the livestock or livestock products. Such classification, including payment of such fees as the commissioner deems reasonable for the services rendered or performed by employees or licensed agents of the department, shall be established under such rules and regulations as the commissioner may prescribe.