do the IAA just want to know if I've done it before so they can see my results?
Who knows, maybe they want to save themselves the hassle/cost of repeating the tests if you have them done already.
Why not just e-mail them and get the clarification you want?
IAA SCP Program.
I know someone who applied and was not successful. He told me that he could not reapply for 2 more years.
Now that was about 4/5 years ago.
Never thought to ask was it the whole process or the aptitude tests.