From the reports which are filed and the information which is received or available to the director, including any proper corrections, the director shall prepare a list of the names and addresses of the producers and the volume of such commodity which was produced or marketed by all such producers and a list of the names and addresses of such handlers and the volume of such commodity which was handled by all such handlers, that are directly affected by the provisions of such proposed marketing order, or amendments to it, in the preceding marketing season. Such lists shall constitute complete and conclusive lists for use in any finding made by the director pursuant to the provisions of Article 12 (commencing with Section 58991) of this chapter and such findings are conclusive.