Cal. Food & Agric. Code § 54171

An association may engage in any activity in connection with the marketing, selling, preserving, harvesting, drying, processing, manufacturing, canning, packing, grading, storing, handling, or utilization of any product which is produced or delivered to it by its members; or the manufacturing or marketing of the byproducts of any such product; or any activity in connection with the purchase, hiring, or use by its members of supplies, machinery, or equipment, or in the financing of any such activities; or in any one or more of the activities which are specified in this section.