Tenn. Code Ann. § 62-35-115: Registration cards - Guards, officers and agents

(a) Except as otherwise provided in this chapter, it is unlawful for any individual to act as an armed or unarmed security guard/officer without having first obtained the appropriate registration card from the commissioner.

(b) Any individual who holds a valid armed security guard/officer registration card may act as an armed or unarmed security guard/officer under that registration card.

(c) Any individual who is employed exclusively as an undercover agent is not required to hold a registration card.