This is the fundamental question: Should "practice" sails be used for racing? By practice sail, I mean one of the several sails produced by non-builder approved sail makers. The class rules say: "If you race a Laser that has a change or addition not allowed by the class rules you will be disqualified from the race." So, what's a "race" and what's "racing"? Does a "race" need to be sanctioned by the Laser class to be a "race"? What if the sailing instructions say the class rules apply? What if the sailing instructions specifically allow "practice" sails? If the sailing instructions don't mention the class rules, and the regatta permits the used of practice sails, can I slap a Laser sticker on my Finn and show up for racing? Can I use my Rooster 8.1 rig? Can you stop me if I do? What would you argue? Why should "practice" sails be allowed in any racing whether it is informal or not?