the type of weapons that are commonly used in stabbing attacks and the levels of impact energy fit young men are capable of generating during such an attack. The study resulted in minimum performance ratings for armour used in the UK, as defined under PSDB publication 6/99. The PSDB standard was replaced in 2007 with the current Home Office Scientific Development Branch (HOSDB) publication No. 39/07/C which governs stab resistant body armor performance in the UK. This updated standard introduced a more stringent testing procedure with more drops than the previous standard plus the introduction of the P1/B Blade which is found to be more aggressive that the older P1/A Blade. In the UK there are no standalone ratings for spike resistance. For stab resistant armor to carry a spike resistance (SP) rating in the UK, it must first pass minimum knife resistance (KR) performance tests. United States In the US, the National Institute of Justice (NIJ) has established a stab-resistant body armor test standard (NIJ STD 0115.00), based on the work in the UK, which defines two threat types: spike and edged blade. Manufacturers of body armor can voluntarily submit armor models for compliance testing through the National Law Enforcement and Corrections Technology Center in Rockville, Maryland. Through the program, manufacturers certify that their armor will defeat the specified threat at one of three threat levels. Threat levels 1, 2 and 3 are based on impact energies of 24, 33 and 43 joules respectively. See also Bulletproof vest Brigandine References External links New Zealand Herald - Councils fight violence with stab vests National Institute of Justice Standard 0115.00, Stab Resistance of Personal Body Armor JTIC Stab-Resistant Armor HOSDB Body Armour Standards for UK Police (2007)Part 3: Knife and Spike Resistance This article incorporates work from https://peosoldier.army.mil/newpeo/Equipment/Temp.asp?id=SPE_CSPBA, which is in the public domain as it is a work of the United States Military. Body armor Law enforcement equipment Law enforcement uniforms