California Code, Civil Code - CIV § 2181

Luggage may consist of whatever the passenger takes with him for his personal use and convenience, according to the habits or wants of the particular class to which he belongs, either with reference to the important necessities or to the ultimate purposes of his journey. Luggage within the meaning of this section shall include the samples, case, wares, appliances and catalogs of commercial travelers or their employers, used by them for the purpose of transacting their business and carried with them solely for that purpose, when securely packed and locked in substantial trunks or sample cases of convenient shape and weight for handling. No crate cover or other protection shall be required for any bicycle carried as luggage, but no passenger shall be entitled to carry as luggage more than one bicycle.