Tennessee Code Title 50. Employer and Employee § 50-1-309

(a)(1) Notwithstanding § 50-1-307, any employee who is an active volunteer firefighter may be permitted to leave work in order to respond to fire calls during the employee's regular hours of employment without loss of pay, vacation time, sick leave or earned overtime accumulation. The employee may be permitted to take off the next scheduled work period within twelve (12) hours following the response as a vacation day or sick leave day without loss of pay, if the employee assisted in fighting the fire for more than four (4) hours. If the employee is not entitled to a vacation day or sick leave day, then the employee may be permitted to take off the work period without pay.

(2) In addition to subdivision (a)(1), any employee who is an active volunteer firefighter and who worked for more than four (4) hours the prior day or night as a volunteer firefighter in an emergency may be permitted to take off the next scheduled work period within twelve (12) hours following the emergency as a vacation day or sick leave day without the loss of pay. If the employee is not entitled to a vacation day or sick leave day then the employee may be permitted to take off the work period without pay.