If you are in NOV class, that is the class you run on the car... "NOV" The ESP or AS or whatever just tells the system what your PAX is for result/trophy purposes.
As far as your number goes, as Kevin said, you can register for a permanent number via the website. Then it is yours for the year.
----In General-------------
Something for everyone to remember when ordering magnetics (since it's the beginning of the year)... Make them contrasting... for example, white DOES NOT contrast on silver, black DOES NOT contrast on red (though the other way works OK), fancy fade jobs can be a pain. Get a nice plain block letters/number font the fancier it gets, the harder it is to read at speed. Make the numbers as large as will fit on your door confortably, or at LEAST the SCCA minimum 8". Make your class letters somewhat proportionally shorter.
My personal preference is for a "number block" where I have 1 magnetic square (the color of my car) that has my number on it and another with the letters on it... this gives more magnetic contact with the car vs cut out letters/numbers, and reduces the number of magnetics I might lose.
If it's a cold morning and the magnetics don't seem to want to form to your car, put them on the engine block after you arrive and warm them up... then stick them to the car. All edges should go down then, and you won't have them fly off where the wind would have caught them before.
If anyone wants to know why this is important, ask to Todd if you can observe in the bus and see how busy it is in there. Then see what a mess it can make if they can't read the numbers, or the course workers can't read the numbers. Big big fun lemme tell ya.
