When discussing rear spoilers / rear wings, ITCS section 8b says that "
Dealer installed or limited production front/rear
spoilers/air dams/wings are prohibited"

I failed to find the term "limited production" in the glossary. For example, the Miata 'type R' was, in relative terms, limited production, compared to the total. How does the SCCA determine what is "limited production", and what is a low take rate?