The appeals board shall fix and award the amounts of special additional compensation to be paid under this article, and shall direct the State Compensation Insurance Fund to pay the additional compensation so awarded. Such additional compensation may be paid only from funds appropriated for such purpose. Out of any such appropriation the fund may reimburse itself for the cost of service rendered in payment of compensation awards pursuant to this article and maintenance of accounts and records pertaining thereto, which cost shall not exceed 5 percent of the amount of award paid.