A court of competent jurisdiction, solely for the purposes of enforcing current or delinquent child support obligations, may provide by appropriate order for withholding amounts due in satisfaction of current or delinquent child support obligations from the pensions or other benefits provided for in the Public Employees Retirement Act and for payment of such amounts to third parties. The court shall not alter the manner in which the amount of pensions or other benefits is calculated by the association. The court shall not cause any increase in the actuarial present value of the pensions or other benefits to be paid by the association. Payments made pursuant to such orders shall only be made when member contributions are refunded or a pension is payable in accordance with the provisions of the Public Employees Retirement Act; in no case shall more money be paid out, either in a lump sum or in monthly benefits, of association funds in enforcement of current or delinquent child support obligations than would otherwise be payable at that time.