Tennessee Code Title 47. Commercial Instruments and Transactions § 47-26-811

The producer or supplier shall cause to be inspected, at intervals of not more than six (6) months, each weighing device used by producers and suppliers for the weighing of natural resource products as defined in this part. The inspection of the scales shall be performed by a certified scale technician of a licensed scale company, or by an employee of the Tennessee department of agriculture or department of transportation, whose duty it is to check scales.