When the department finds after investigation that the distribution in the state of a class of food may, by reason of contamination with microorganisms during the manufacture, processing, or packing, be injurious to health, and that the injurious nature cannot be adequately determined after the articles have entered commerce, it, in that case only, shall adopt regulations providing for the issuance of permits to manufacturers, processors, or packers of that class of food, to which shall be attached the conditions governing the manufacture, processing, or packing of that class of food, for a temporary period of time as may be necessary to protect the public health. After the effective date of the regulations, and during the temporary period, no person may introduce or deliver for introduction into commerce the food so manufactured, processed, or packed by any manufacturer, processor, or packer unless the manufacturer, processor, or packer of it holds a permit issued by the commissioner.