If sailmakers are going to build sails out of materials not on the approved list, should/could they be required to submit to the class the new material specifications to show that it is not a game changing fabric and is within the spirit of the law. The class can then give conditional approval AHEAD OF TIME for the new fabric to be used until the rules can be officially ammended to allow the new fabric. IMHO, this would eliminate situtions like the one that developed at worlds.