Form1
If the engines were built with STC'd components then a Form 1 would be issued. If a potential LAA builder wants some gucci bits that are not STC'd then obviously a Form1 would not be issued.
I originally envisioned them going to someone who knew exactly the components that they desired so they could be bespoke built (eg. hi comp pistons & one mag replaced with electronic ignition. A SkyDynamics exhaust and Airflow injector unit.)
Stik