Cal. Pub. Util. Code § 5381.5

(a) The commission shall, by rule or other appropriate procedure, ensure that every charter-party carrier of passengers operates on a prearranged basis within the state, consistent with Section 5360.5. The commission shall require every charter-party carrier of passengers to include on a waybill or trip report at least all of the following:
1. (1) The name of at least one passenger in the traveling party, or identifying information of the traveling party’s affiliation, along with the point of origin and destination of the passenger or traveling party.
2. (2) Information as to whether the transportation was arranged by telephone, written contract, or electronic communication.
(b) A waybill or trip report may be kept in electronic or hardcopy format. When requested by any commission or airport enforcement officer or any official of a city, county, or city and county authorized to inspect a waybill or trip report pursuant to subdivision (g) of Section 5371.4, the waybill or trip report may be provided in either electronic or hardcopy format.
(c) A charter-party carrier of passengers shall produce in its office a hardcopy of any waybill or trip report when requested by the commission or one of its authorized representatives pursuant to Section 5389.