Appellee company grows cantaloupes of superior quality in Parker, Arizona. Since the company lacks packing sheds in Parker, it transports the cantaloupes to its nearby facilities in California, where they are sorted, inspected, packed, and shipped in containers that bear the name of the California packer. Appellant official, acting under the Arizona Fruit and Vegetable Standardization Act, which is designed to prevent deceptive packaging, entered an order prohibiting the company from shipping its cantaloupes outside the State unless they were packed in containers in a manner approved by appellant. Appellant contends that his order is necessary to ensure that the cantaloupes be identified as of Arizona origin. Appellee brought this suit for injunctive relief challenging the constitutionality of the order, which would have the effect of requiring appellee to build packing facilities in or near Parker at a cost of about $200,000