Ok is this form for people who have allready been issued an FAA Certificate from a foreighn licence in the past?
Or is it just for newbies about to do Training in the US.
You need this for the first time to get a FAA restricted License plus every time you add a rating to your restricted FAA PPL, i.e. IFR, ME etc.
I am asking if I would need to fill this in prior to getting a Type over 12,500lbs?
That's a whole different animal, check
https://www.flightschoolcandidates.gov/
hth,
sun'n fun