Cal. Business and Professions Code § 17523

Any blind workman, who is a citizen or resident of this State, or any institution, public or private, corporation, partnership, and association engaged within this State in the manufacture, sale, or distribution of articles or merchandise, made, manufactured, or fabricated by blind workmen is authorized to imprint or stamp upon such articles or merchandise or affix thereto, labels containing the words “made by a blind workman,” or “made by the blind,” or “blind-made,” if not less than 75 percent of the total hours of direct labor of producing said products have been performed by a blind workman. Such labels, shall also have the place of manufacture on them and, if desired, the name of the particular workman who made, manufactured, or fabricated the article.