Note 1 to § 23.4 : It is unfair or deceptive to use the term "vermeil" to describe a product in which the sterling silver has been covered with a base metal (such as nickel) plated with gold unless there is a disclosure that the sterling silver is covered with a base metal that is plated with gold.
Note 2 to § 23.4 : Exemptions recognized in the assay of gold filled, gold overlay, and rolled gold plate industry products are listed in the appendix.
16 C.F.R. §23.4