Why can't I get a scholarship in CCDSAP only because I am a school student?

I worked really hard after watching the CCDSAP 100% scholarship program. I have participated in August-LongChallenge, got 500+points.(btw the criteria is only 400+ points) and have rank 1 in my institution. However I’m pretty dissapointed after knowing that I can’t avail the scholarship only because I’m a school student.