I don't know this shooters, but when I went back to my hometown and shot under IPSC Rules, it was MY responsibility to make sure that my rig was legal for the IPSC rules and MY fault alone if I didn't follow the rules for the game I was playing.
I was placed in Open at the 2005 Area 3 because I had a Plastic Grip Plug on my G17, My bad, I didn't read Production Rules, I didn't have anyone but ME to blame.