California Code, Insurance Code - INS § 11784

(a) Enter into contracts of workers' compensation insurance.

(b) Sell annuities covering compensation benefits.

(c) Decline to insure any risk in which the minimum requirements of the industrial accident prevention authorities with regard to construction, equipment, and operation are not complied with, or which is beyond the safe carrying of the fund.  Otherwise, he or she shall not refuse to insure any workers' compensation risk under state law, tendered with the premium therefor.

(d) Reinsure any risk or any part thereof.

(e) Cause to be inspected and audited the payrolls of employers applying to the fund for insurance.

(f) Make rules for the settlement of claims against the fund and determine to whom and through whom the payments of compensation are to be made.

(g) Contract with physicians and surgeons, and hospitals, for medical and surgical treatment and the care and nursing of injured persons entitled to benefits from the fund.