Minn. Stat. § 31.37

Any person owning or operating a canning factory shall, by written notice on or before June first, of each year, notify the commissioner whether or not such factory is to be operated during that season or year, giving kinds and varieties of products to be canned or manufactured that season. At least ten days prior to the beginning of operation of any canning factory, the commissioner shall be notified, in writing, of such intended operation. On or before November fifteenth, of each year, the owner, manager, or superintendent of such factory shall furnish the commissioner, agent, or inspector, with a report giving such information concerning the factory as the commissioner, agent, or inspector may require.