Cal. Food & Agric. Code § 54174

An association may purchase or otherwise acquire, hold, own, and exercise all rights of ownership in, sell, transfer, pledge, or guarantee the payment of dividends or interest on, or the retirement or redemption of, shares of the capital stock or bonds of any corporation or association which is engaged in any related activity or in the warehousing, handling, marketing, packing, manufacturing, processing, or preparing for market of any product which is handled by the association.