Tenn. Code Ann. § 38-6-105

Any agent or uniformed law enforcement officer of the Tennessee bureau of investigation who retires after twenty-five (25) years of honorable service shall be issued a retired commission card by the bureau. The card shall identify the agent or uniformed law enforcement officer and that the agent or uniformed law enforcement officer is retired. Cards issued under this provision shall bear the inscription, in print of equal or larger size than the rest of the printing on the card, the words “Not a handgun permit.” After twenty-five (25) years of honorable service by an agent or uniformed law enforcement officer of the bureau, in recognition of the agent's or uniformed law enforcement officer's many years of good and faithful public service, the bureau shall authorize the agent or uniformed law enforcement officer to retain the agent's or uniformed law enforcement officer's service weapon.