Interpretation of ST rule for spoilers

[Dave_G]

The COM rule book states this regarding spoilers in Street Touring classes:

Aftermarket aerodynamic devices are prohibited with the exception of front air dams/spoilers and rear spoiler,
unless a factory option. Front air dam must be fixed and positioned no lower than bottom of wheel

I understand this to mean that except for the height requirement and being fixed, front spoilers are unrestricted, correct? Do splitters fall into the category of "air dams/spoilers," or are those something different?

At Tremblant I was convinced that adding something to the font of my Miata's currently naked nose would in fact make a difference. I just want to make sure I understand the rule correctly before going wild with the front of my car.

[brucesallen]

note the height restriction: "positioned no lower than bottom of wheel"

[Grippy]

keep in mind, it is hard to creat downforce, it is easy to increase drag.
The factory lip is a good compromise, the Garage Vary piece is a bit better IMHO.