http://www.thegunzone.com/hague.html
On 12 October 1990, another Memorandum of Law from Parks at the request of the Commander of the United States Special Operations Command (USSOCOM) and coordinated with the Department of State, Army General Counsel, as well as the Offices of the Judge Advocates General of the Navy and Air Force, concluded that:
"The purpose of the 7.62mm "open-tip" MatchKing bullet is to provide maximum accuracy at very long range. … Bullet fragmentation is not a design characteristic, however, nor a purpose for use of the MatchKing by United States Army snipers. Wounds caused by MatchKing ammunition are similar to those caused by a fully jacketed military ball bullet, which is legal under the law of war, when compared at the same ranges and under the same conditions. (The Sierra #2200 BTHP) not only meets, but exceeds, the law of war obligations of the United States for use in combat."
Colonel W. Hays Parks, U.S. Marine Corps Reserve, Retired, served in Vietnam in infantry and judge advocate assignments and was a legal adviser for the 1986 Libyan air strike. An expert with small arms, he has trained and qualified as a sniper. He has lectured on rules of engagement at the war colleges and staff colleges, the Navy Fighter Weapons School, and Naval Strike Warfare Center and authored Deadly Force Is Authorized.