The law is the same in norcal and socal. GVWR of 5ver between 10k amd 15k you need an endorsement on your class c license (12804.9 veh code). GVWR over 15k then non com class A or commercial A. The class c endorsement is free and involves 25 question test and self certify medical. To upgrade to non com A you need 25 question written test, self certify med and a drive test and pay for upgrade fee. BTW when my DW got her class c endorsement they took a new picture for her new license (not happy about not being prepared you know hair and makeup stuff). Also note the law says GVWR not actual weight!