The license and permit fees collected as provided by the Livestock Auction Market Act are an occupation tax and shall be remitted to the State Treasurer for credit to the Livestock Auction Market Fund. All money so collected shall be appropriated to the uses of the Department of Agriculture for the purpose of administering such act and shall be paid out only on vouchers approved by the director and upon the warrant or warrants issued by the Director of Administrative Services. Any unexpended balance in such fund at the close of any biennium shall, when reappropriated, be available for the uses and purposes of the fund for the succeeding biennium.