For me, the form was under the upload document section but I never received any confirmation beyond that.
Angela emailed me and told me a position had become available and asked if I was still interested (and if she didn't hear back in a few days the application would be closed). So I don't think that form was really considered since I already had checked off that I was interested in being on the waitlist.
Not sure if things will change post April 24th! Hope that helps and good luck!