I believe that is in accordance with the Hague Protocols. The Geneva Conventions (the most recent one in 1949) deals specifically how certain classes of personnel are to be treated in time of war including POWs, medical personnel and non-combatants (civilians). The Hague Convention of 1907 (known as the Hague Protocols) outlawed the use of hollowpoint and other expanding and frangible small arms ammunition, to the best of my knowledge.
The US Armed Forces as have most military establishments in the world have generally adhered to this policy. I don't think you will find many hollowpoints in the magazines of terrorist used military weapons, for instance.
The US Armed Forces as have most military establishments in the world have generally adhered to this policy. I don't think you will find many hollowpoints in the magazines of terrorist used military weapons, for instance.