Inspection or shipping permit by the Washington state department of agriculture is required on each shipment of soft tree fruits to a fresh market outlet, and this includes shipment to any custom processor outside the area of production. The proper Washington state fruit commission assessments and any applicable federal marketing committee assessments on such shipment shall be remitted to the Washington soft fruit fund (in care of the Washington state department of agriculture or the fruit commission) by the person or firm that applied for inspection or release. The amounts of the assessments shall be determined by current assessment rates and the information contained in the inspection certificates or shipping permits. Payment of assessments shall be made upon inspection or release, or as determined in the reasonable discretion of the department and the commission by prompt payment of invoices issued to some regular accounts. (Combined collection of fruit commission and marketing committee assessments reduces over-all expenses to the industry.)