Cal. Bus. & Prof. Code § 23321
The license for trains shall be issued to a railroad company or other person selling distilled spirits on board trains operating in this State, and a duplicate thereof shall be obtained for each train on which distilled spirits are sold. The license for cars of sleeping car companies shall be issued to a sleeping car company operating sleeping cars in this State, and a duplicate thereof shall be obtained for each train in which distilled spirits are sold by such companies. The license for airplanes shall be issued to an air common carrier selling distilled spirits on board airplanes operating in this State, and a duplicate thereof shall be obtained for each scheduled flight on which distilled spirits are sold.
Ca. Bus. and Prof'l. Code § 23321