Prior to going to the World you must first qualify unless you plan to shoot the Trophy round. When you go to the qualifing rounds to register I would show the regiestering personnel the equipment that you are using for the class that you are registering for and have them qualify or disqualify your equipment. As I read the specific qualifications for a bow I thought it was quite clear what was allowable. If you are working with a bowyer he should be able to interept the rule as to what is allowable. If the manufacturer is a private individual he may want to direct any of his questions to the AMO Companys or the president of the IBO for clarifications. No one person has written these guide lines and rules so I think that someone in the planing of the rules could advise you.
I am in no authorative capacity and am only offering my opinion in an effort to help. The class you are inquiring about as I know a few of these archers for the most part are only ingterested in enjoying the competition and expierence of shooting with other archers. For the most part they like to use the KISS method.