(a) Penalties for failure The owner, agent, consignee, charterer, master, or commanding officer of any vessel or aircraft arriving in the United States from any place outside thereof who fails (1) to detain on board the vessel, or in the case of an aircraft to detain at a place specified by an immigration officer at the expense of the airline, any alien crewman employed thereon until an immigration officer has completely inspected such alien crewman, including a physical examination by the medical