California Labor Codes 138.4 104
§ Loss of time injuries
The administrative director shall, with respect to injuries involving loss of time:
(a) Prescribe reasonable rules and regulations for the serving on the employee of notices dealing with the payment, nonpayment or delay in payment of temporary disability, permanent disability, and death benefits and the provision of vocational rehabilitation services, with copies to the administrative director. A pamphlet published or approved by the administrative director, meeting the criteria specified in subdivision (b) of Section 139.6, shall be included with the first notice of payment or notice of delay in payment served on each injured employee.
(b) Prescribe reasonable rules and regulations for providing the employee notice of any change in the amount or type of benefits being provided, the termination of benefits, and an accounting of the benefits paid, with copies to the administrative director.
(c) Prescribe reasonable rules and regulations for serving on the employee notice of rejection of any liability for compensation and the remedies available to the employee, and the employee's right to seek information and advice from an information and assistance officer or an attorney.