16 C.F.R. § 300.6 Labels to be avoided.
Title 16 - Commercial Practices
Stamps, tags, labels, or other marks of identification, which are insecurely attached, or which in the course of offering the product for sale, selling, reselling, transporting, marketing, or handling incident thereto are likely to become detached, indistinct, obliterated, illegible, mutilated, inaccessible, or inconspicuous, shall not be used.
Title 16: Commercial Practices
PART 300—RULES AND REGULATIONS UNDER THE WOOL PRODUCTS LABELING ACT OF 1939
Labeling
§ 300.6 Labels to be avoided.

