A.(1)  The board of trustees shall designate an actuary who shall be the technical adviser of the board of trustees on matters regarding the operation of the funds created by the provisions of this Chapter, and shall perform such other duties as are required in connection therewith.  

(2)  In the year nineteen hundred thirty-eight, and at least once in each five-year period thereafter, the actuary shall make an actuarial investigation into the mortality, service and compensation experience of the members and beneficiaries of the retirement system, and shall make a valuation of the assets and liabilities of the funds of the system, and taking into account the result of such investigation and valuation, the board of trustees shall:  

(a)  Adopt for the retirement system such mortality, service and other tables as shall be deemed necessary.  

(b)  Certify the rates of contribution payable by the state of Louisiana on account of new entrants at various ages.  

(3)  On the basis of such tables as the board of trustees shall adopt, the actuary shall make an annual valuation of the assets and liabilities of the funds of the system created by this Part.  

(4)  Any new tables and interest assumptions adopted in accordance with Subparagraph (2)(a) above shall only be applicable with respect to persons who are members on the date of adoption.  Tables in effect on the date of retirement shall remain applicable with respect to persons who retire prior to the adoption of new tables.  

B.  The assets of this system shall be held in trust by the board of trustees, which board shall have exclusive authority and discretion to manage and control such assets.  The assets of the system shall be held for the exclusive purpose of providing benefits to members of the system and their beneficiaries and defraying reasonable expenses of administering the system.  

C.  The board of trustees may employ or appoint a portfolio control manager as an employee, at its own cost and expense without the approval of the governor.  

D.(1)  Unless different actuarial assumptions are formally adopted and disclosed, as provided herein, the following assumptions shall determine the actuarial equivalents as used in this retirement system:  

(a)  Interest shall be compounded annually at the rate of seven percent per annum.  

(b)  Annuity rates shall be determined on the basis of the 1971 Group Annuity Mortality Tables.  

(2)  The board of trustees may authorize the use of interest and mortality rates in determining the actuarial equivalents which are different from the actuarial assumptions used for other purposes hereunder.  Any change in such actuarial assumptions shall be considered a part of this retirement system and shall be considered an amendment to the provisions of this Section.  In order to be effective, such change must be formally adopted by the board of trustees and disclosed to members of the retirement system.  

Amended by Acts 1978, No. 648, §10, eff. July 13, 1978; Acts 1987, No. 591, §1; Redesignated from La. Rev. Stat. 17:660 by Acts 1991, No. 74, §3, eff. June 25, 1991.