The produce railcar pool account is created in the custody of the state treasurer. All receipts from per diem charges, mileage charges, and freight billing charges paid by railroads and shippers that use the railcars in the Washington Produce Railcar Pool must be deposited into the account. Expenditures from the account may be used only for the purposes of RCW 47.76.400 through 47.76.440. Only the secretary of transportation or the secretary’s designee may authorize expenditures from the account. The account is subject to allotment procedures under chapter 43.88 RCW, but an appropriation is not required for expenditures.