All my local 3D shoot are either ASA clubs or IBO clubs. If they are an IBO club, they say they follow IBO rules. I havemade a few changes to my bow this year and I want to find the differences between ASA and IBO rules; however, I have yet to find a rule book for either. Can someone point me in the right direction. Also, I have heard that IBO changed a rule on allowable arrow size as well as fletching size. Can someone tell me if this is correct and what the changes are.

Thanks