depends on what organization, which format, and what class.
There is
dB drag = TermLab on windshield, all windows sealed shut. seats can fold down.
USACi = Legal SPL uses TermLab on dash
Outlaw SPL uses TermLab in kick panel or anyother place in the cabin that you like.
Port Wars uses TermLab in the port. Windows can be opened or closed.
MECA SPL = TermLab on dash, windows sealed up
Drive by SPL uses meter outside the car with windows down.
Realistic SPL uses TermLab at the headrest.
IASCA IDBL = TermLab on windshield with windows sealed up
I am tired, I forget all the details and I forget the rest.