Cal. Lab. Code § 1173
It is the continuing duty of the Industrial Welfare Commission, hereinafter referred to in this chapter as the commission, to ascertain the wages paid to all employees in this state, to ascertain the hours and conditions of labor and employment in the various occupations, trades, and industries in which employees are employed in this state, and to investigate the health, safety, and welfare of those employees.
The commission shall conduct a full review of the adequacy of the minimum wage at least once every two years. The commission may, upon its own motion or upon petition, amend or rescind any order or portion of any order or adopt an order covering any occupation, trade, or industry not covered by an existing order pursuant to this chapter.
Before adopting any new rules, regulations, or policies, the commission shall consult with the Occupational Safety and Health Standards Board to determine those areas and subject matters where the respective jurisdictions of the commission and the Occupational Safety and Health Standards Board overlap. This consultation need not take the form of a joint meeting. In the case of such overlapping jurisdiction, the Occupational Safety and Health Standards Board shall have exclusive jurisdiction, and rules, regulations, or policies of the commission on the same subject have no force or effect.
Ca. Lab. Code § 1173