Any contributor separated from county employment by dismissal, resignation, or any other reason, except retirement, or any county officer having legally withdrawn from the retirement system, who returns to county employment and restores to the fund to the credit of the members' annuity reserve account his accumulated deductions as they were at the time of separation, shall have the annuity rights forfeited by him restored. Payments may be made either in a lump sum or by installments; but, in no event shall the installments be less than sufficient to pay such amount by the time the member attains superannuation retirement age.
16 P.S. § 11676