Tenn. Code § 49-1530
Immediately succeeding the next valuation the actuary engaged by the board of trustees shall compute the rate per cent of the total annual earnable compensation of all members which is equivalent to four per cent (4%) of the amount of the total state annuity liability on account of all members and beneficiaries which is not dischargeable by the funds in hand standing to the credit of the accumulation account and the aforesaid normal contributions to be made on account of such members during the remainder of their active service. The rate per cent originally so determined, or as thereafter determined on the basis of actuarial valuation and certified by the board of trustees as a rate of contribution sufficient to discharge said amount prior to July 1, 1995, shall be known as the "accrued liability contribution" rate.
T.C.A. § 49-1530