16 CFR § 1202.6 - Marking.

(a) The manufacturer's or private labeler's name and city or a symbol which will identify the name and city shall appear on the matchbook. In addition, every private labeler must label the matchbook with a code which enables it to identify, if requested, the manufacturer of the product.

(b) Boxes or cartons in which two or more caddies are shipped shall be marked “For safety, store in a cool, dry place.”