(a) Any district attorney may, after 30 days' written notice to the board of trustees, withdraw his total payments, without interest, from the fund. His right to participate in the benefits under this chapter shall cease unless he otherwise qualifies as an active district attorney during a resumed period of payment.

(b) The employee contributions paid by the employer to the fund on behalf of a district attorney under subsection (c) of Code Section 47-12-43 after July 1, 1980, shall be considered to be payments made by the district attorney.