As you may have noticed when doing PILAPT you get scores for each exercise you complete. CTC will have a good idea of what pass mark to set as to select candidates they feel can pass flight training. Your scores are averaged, and you are given an overall score.
Tagged schemes obviously want a better calibre of student, so raise this minimum pass mark to get through the first stage of selection.
As a rough idea, one school raised their pass mark by 8 for FPP selection as opposed to their usual standards.
