Cal. Lab. Code § 138.4
(b) With respect to injuries resulting in lost time beyond the employee’s work shift at the time of injury or medical treatment beyond first aid:
(c) The administrative director, in consultation with the Commission on Health and Safety and Workers’ Compensation, shall prescribe reasonable rules and regulations, including notice of the right to consult with an attorney, where appropriate, for serving on the employee (or employee’s dependents, in the case of death), the following: