19 year old allowed access to handgun at work?

[f350fiver]

My daughter works by herself at a vapor store and was asking about being able to keep a handgun at work. Her boss did not like the idea of a scatter gun since it is harder to wield in a conflict with a better chance of being taken away and used against her. TN law 39-17-1319 says she can transport it from point A to point B. I would like to know if anyone would know the law about someone under 21 years of age to have access to defend herself should the need arise.

[johnharris]

[f350fiver]

Thank you for the reply. It seems this is a grey area since she is no longer a mior. Would an email to the state attorney general be a place to start? I could find nothing specific on the subject in the TN gun laws.