Can I register my son for 2 schools? If I can get in thru Phase 1 in one school but I prefer Catholic High and will try my luck in Phase 2B. Can it work that way?

Hi, I am hoping to get into phase 2B for Catholic High. Is being Catholic not good enough to qualify for this phase? Do I have to be some kind of committee in order to qualify for phase 2B? I am worry and if there is anything I can do now. My son is born in 2008 which mean registration next year for 2015 intake. Please advise.