California Code, Business and Professions Code - BPC § 22180

Any person who applies or causes any quality mark to be applied to any article which is made in whole or in part of gold or of any of its alloys shall also apply a trade-mark duly applied for or registered to him under the laws of the United States or of this State to such article.

If the person so applying such mark is the manufacturer of the article and has sold or contracted to sell such article to a jobber, wholesale or retail dealer regularly engaged in the business of buying and selling similar articles, this section shall be deemed to be complied with if a trade-mark duly registered under the laws of the United States or of this State to such jobber, wholesale or retail dealer is applied to such article.