Tennessee Code Title 68. Health, Safety and Environmental Protection § 68-11-261

(a) Each hospital, recuperation center, nursing home, residential hospice, home for the aged, residential HIV supportive living facility, assisted-care living facility or ambulatory surgical treatment center licensed under this chapter, except those operated by the United States government, must ensure that an emergency keyed lock box is installed next to each bank of functioning elevators located on the main level. The lock boxes shall be permanently mounted seventy-two inches (72″) from the floor to the center of the box, be operable by a universal key, no matter where the box is located, and shall contain only fire service keys and drop keys for the appropriate elevators. General standards for the design of such boxes shall be approved by the department of labor and workforce development; provided, however, that the standards must be consistent with all applicable building and life safety standards governing the facility.

(b) Failure to comply with this section shall be a Class C misdemeanor, and shall be punishable by a fine only of not more than two hundred fifty dollars ($250).