16 C.F.R. § 1209.39
(a)
(1) Responsibilities of manufacturer for insulation sold in bags. Manufacturers of cellulose insulation subject to the standard which is sold in bags or other containers shall certify compliance with the standard by marking each bag or container with the following information:
(iv) The place of manufacture, by city, state, and zip code, or in the case of products manufactured outside the United States, by city and country.
The information required by this § 1209.39(a) may appear anywhere on the bag or container. The information required need not appear at the same place on the bag or container. The information shall be permanent until the bag or container is opened and used. The information shall be conspicuous and must appear in letters and figures at least 1/4 inch in height. The date and place of manufacture may be in code, provided the person or firm issuing the certificate maintains a written record of the meaning of the code that can be made available to consumers, persons in the chain of distribution, and the Commission upon request.