If you ever work the scales far the small bore group or the big bore group you will see the reason for the sticker. With all the alternate weights is different classes for different equipment you have to ask 3 or 4 questions to figure out what allowances that car uses. Remember this is usually asked in an environment where competitors are not allowed to hear what the guy is saying. What motor, what heads, what tranny. If you make the guy post it on the side of the car and his competitor thinks it looks fishy it is easy to verify. I would not know an alternate GT tranny from a hole in the ground but the guys racing against him do. Now they can see what weight he is claiming.