Tennessee Code Title 71. Welfare § 71-4-2303

(b)(1) Preventative maintenance must be performed by a qualified technician who is an employee of the authorized complex rehabilitation technology supplier, and must be performed according to the manufacturer's guidelines.  The preventative maintenance may be performed during a complex rehabilitation technology appointment for an unrelated issue, and is not required to be a standalone appointment or event.

(2) The authorized complex rehabilitation technology supplier shall document and maintain all records of preventative maintenance services performed pursuant to this part.