9Presumption as to evidence in case of illegal ship.
Where any ship is built by order of or on behalf of any foreign state when at war with a friendly state, or is delivered to or to the order of such foreign state, or any person who to the knowledge of the person building is an agent of such foreign state, or is paid for by such foreign state or such agent, and is employed in the military or naval service of such foreign state, such ship shall, until the contrary is proved, be deemed to have been built with a view to being so employed, and the burden shall he on the builder of such ship of proving that he did not know that the ship was intended to he so employed in the military or naval service of such foreign state.