Tenn. Code § 8-36-915
Except as otherwise provided in this part, administration of the defined benefit component of the hybrid plan shall be governed by chapters 34-37 of this title and administration of the optional retirement program shall be governed by chapter 25; provided, however, that any reference in chapters 34-37 of this title to the eligibility requirements for an early or service retirement allowance under the hybrid plan shall for purposes of this part mean the eligibility requirements set forth in §§ 8-36-906 and 8-36-910. Any reference in chapters 34-37 of this title to the formula for computing an early or service retirement allowance, or for computing a disability retirement allowance under the hybrid plan shall for purposes of this part mean the applicable formula as set out in §§ 8-36-907 - 8-36-909 and §§ 8-36-911 - 8-36-913.
T.C.A. § 8-36-915