Quoting 9.1.3.C: "To maintain the stock basis of Improved Touring, updating and/or backdating of components is only permitted within cars of the same make, model, body type (e.g., sedan, station wagon, convertible, etc.), and engine size as listed on a single Improved Touring Specification Line."

Okay, so if this didn't say "as listed on a single Improved Touring Specification Line," then this would be very clear. It would mean that you simply cannot, ever, exchange parts from one body type into another.

But add that clause, and I get confused. What if a single spec line includes more than one body type (as most do?)