A member shall receive credit under this article for prior employment in public service only for such service as he or she is not entitled to receive a pension or retirement allowance from such public agency. It shall be established to the satisfaction of the retirement system manager that no pension retirement allowance will accrue to such member by virtue of his or her employment in such public agency. This section shall not apply to any pension or annuity payable pursuant to the contract entered into by the former city of North Sacramento with a private insurance company which is represented by any city contributions retained by the company under that contract. (Prior code § 34.08.803)