Thirty days prior to the expiration of the 24-month period of storage, the warehouse operator shall give notice to the owner of any lot of food that such food must be removed, unless the Commissioner of Agriculture and Markets shall have issued an order extending the time of storage. When an extension of the storage period has been granted, the operator shall again give notice to the owner 30 days before the expiration of the extended period. A copy of each notice required by this rule shall be promptly mailed to the Commissioner of Agriculture and Markets.