(a) When, in an official establishment, any inspected and passed product is placed in any receptacle or covering constituting an immediate container, there shall be affixed to such container a label as described in section 317.2 of this Part except that the following do not have to bear such a label:

1. (1) Wrappings of dressed carcasses and primal parts in an unprocessed state, bearing the official inspection legend, if such wrappings are intended solely to protect the product against soiling or excessive drying during transportation or storage, and the wrappings bear no information except company brand names, trade marks, or code numbers which do not include any information required by section 317.2 of this Part;
2. (2) Uncolored transparent coverings, such as cellophane, which bear no written, printed, or graphic matter and which enclose any unpackaged or packaged product bearing all markings required by Part 316 of this Article which are clearly legible through such coverings;
3. (3) Animal and transparent artificial casings bearing only the markings required by Part 316 of this Article;
4. (4) Stockinettes used as “operative devices”, such as those applied to cured meats in preparation for smoking, whether or not such stockinettes are removed following completion of the operations for which they were applied;
5. (5) Containers such as boil-in bags, trays of frozen dinners, and pie pans which bear no information except company brand names, trade marks, code numbers, directions for preparation and serving suggestions, and which are enclosed in a consumer-size container that bears a label as described in section 317.2 of this Part; and
6. (6) Containers of products passed for cooking or refrigeration and moved from an official establishment under section 311.1 of this Article.