California Code, Unemployment Insurance Code - UIC § 3251

An employer, a majority of the employees employed in this state of an employer, or both, may apply to the Director of Employment Development for approval of a voluntary plan for the payment of disability benefits to the employees so electing. The benefits payable as indemnification for loss of wages under any voluntary plan shall be separately stated and designated in the plan “unemployment compensation disability benefits” separate and distinct from other benefits, if any.