Cal. Lab. Code § 2652

The division shall have the power to make an investigation of any industry not specifically exempted and made unlawful by Section 2651 which employs industrial homeworkers, in order to determine whether the wages and conditions of employment of industrial homeworkers in the industry are injurious to their health and welfare or whether the wages and conditions of employment of the industrial homeworkers have the effect of rendering unduly difficult the maintenance of existing labor standards or the enforcement of labor standards established by law or regulation for factory workers in the industry.