The special reserve fund shall be the fund to which any earnings in excess of the amounts annually allowed under the provisions of section 33 of this act shall be transferred. No additional amounts shall be credited to the special reserve fund at any time when the total accumulations in such fund shall equal 1% of the book value of the investments of the retirement system. In this event, any such excess shall be credited to the contingent reserve fund. All losses from the sale of securities shall be charged against the special reserve fund. The special reserve fund shall be considered for valuation purposes by the actuary as an asset of the retirement system.
N.J.S. § 43:15A-28