Tennessee Code Title 8. Public Officers and Employees § 8-25-212

Any member of the retirement system who participated in the optional retirement program and received a limited lump sum distribution of contributions pursuant to § 8-25-205(c)(1) [repealed] shall be entitled to establish service and salary credit in the retirement system for the period during which those contributions were made to the member's optional retirement account. To establish service, the member must pay to the retirement system a sum equal to twelve and sixty-five hundredths percent (12.65%) of the member's earnable compensation during the period those contributions were made to the member's optional retirement account, plus interest on that amount at the rate provided in § 8-37-214.