The interest rate applied to service purchase calculations will be the System's current long-term discount rate of return. Interest rate changes will be effective the first of the month following a four-month period after the Board of Trustees adopts an amended long-term discount rate of return.
Ga. Comp. R. & Regs. R. 513-5-1-.52
O.C.G.A. Sec. 47-3-26.