Good question, and I will be updating my spec list above with this info:

Steerer tube requirements:
1. Must be 27mm min/45mm max longer than bare headtube measured from fork crown
2. Threads on steerer tube must end no more than 16mm above the edge of the bare headtube (using fork crown as reference)

I need to take some pictures demonstrating how to take these measurements but hopefully they make some sense already. And regarding those measurements, most paired frame/forks will meet those specs. The only ones that won't are when numerous/thick spacers are used between the jam nut and upper race. When trying to combine some random frame and fork that have never previously been assembled, you will want to take some measurements first. Too short is a safety issue. Too long and you won't be able to preload the headset bearings.