Encyclopaedia Britannica, 11th Edition, "Gassendi, Pierre" to "Geocentric" Volume 11, Slice 5
iii. Hospital-ships, equipped wholly or in part at the cost of private
individuals or officially-recognized Societies of neutral countries shall be respected and exempt from capture [if the neutral power to whom they belong has given them an official commission and notified their names to the belligerent powers at the commencement of or during hostilities, and in any case before they are employed] _on condition that they are placed under the orders of one of the belligerents, with the previous consent of their own Government and with the authorization of the belligerent, and on condition that the latter shall have notified their names to the enemy at the commencement or during the course of hostilities, in any event, before they are employed._
iv. The ships mentioned in Articles i., ii. and iii. shall afford relief and assistance to the wounded, sick and shipwrecked of the belligerents independently of their nationality.
The governments engage not to use these ships for any military purpose.
These ships must not in any way hamper the movements of the combatants.
During and after an engagement they will act at their own risk and peril.
The belligerents will have the right to control and visit them; they can refuse to help them, order them off, make them take a certain course, and put a commissioner on board; they can even detain them, if important circumstances require it.
As far as possible the belligerents shall inscribe in the sailing papers of the hospital-ships the orders they give them.