Georgia Code Title 47. Retirement and Pensions § 47-5-40

(b) Each employer is further empowered to implement such plan or plans by contract with the board of trustees in accordance with the rules and regulations promulgated by the board of trustees. The contract with the board of trustees shall be executed pursuant to the ordinance or resolution which enacted the plan.

(c) Each employer is authorized to make reasonable classifications of employees in its plan and to provide for integration of its plan with social security benefits and with other retirement or pension plans under which certain classes of employees may be entitled to benefits.

(d) Each employer is authorized to appropriate funds to provide the benefits under such plan and to pay its respective portion of the administrative costs of the board of trustees in administering the system. Except with respect to employee contributions to purchase additional service credit, an employee's contribution under a defined benefit plan shall not exceed 50 percent of the value of such employee's benefit payable from the plan upon commencement of benefits. The valuation of benefits under a defined benefit plan shall be made in accordance with the actuarial assumptions used to determine employer contributions in effect at the time of the determination.

(e) Contributions paid by a municipal corporation shall be paid from municipal funds which are on hand or which will be collected in the year the contribution is made and shall not be deemed to create a debt of the municipal corporation.