California Code, Business and Professions Code - BPC § 19253.1

A household mover shall not advertise, quote, or charge a rate or an amount for the transportation of used household goods and personal effects that is based on the amount of cubic feet or other volumetric unit measurement of those household goods and effects. In addition to any other remedy, a household mover that violates this section shall not be entitled to any compensation for the transportation of the household goods and effects and shall make restitution to the shipper of any compensation collected.