The board of trustees shall consult an actuary at least each biennium who shall be the technical advisor to the board on matters regarding the operation of the public service commissioners' retirement fund and shall perform such other duties as are required by the board in connection with the public service commissioners' retirement system as established by §§ 65-151 - 65-168. The fee for his services shall be paid from income received on investments of the fund. The actuarial requirements of the public service commissioners' retirement system shall be determined so that contributions and/or appropriations to the fund will meet current actuarial liabilities and amortize all unfunded accrued actuarial liabilities by 1999.
T.C.A. § 65-164