California Civil Code Section 2175

A common carrier cannot be exonerated, by any agreement made in anticipation thereof, from liability for the gross negligence, fraud, or willful wrong of himself or his servants. (2176.) Section Twenty-one Hundred and Seventy-six. A passenger, consignor, or consignee, by accepting a ticket, bill of lading, or written contract for carriage, with a knowledge of its terms, assents to the rate of hire, the time, place, and manner of delivery therein stated; and also to the limitation stated therein upon the amount of the carrier`s liability in case property carried in packages, trunks, or boxes, is lost or injured, when the value of such property is not named; and also to the limitation stated therein to the carrier`s liability for loss or injury to live animals carried. But his assent to any other modification of the carrier`s obligations contained in such instrument can be manifested only by his signature to the same. (2177.) Section Twenty-one Hundred and Seventy-seven. A common carrier is not responsible for loss or miscarriage of a letter, or package having the form of a letter, containing money or notes, bills of exchange, or other papers of value, unless he be informed at the time of its receipt of the value of its contents.