St Francis' School, like any other Integrated School in New Zealand, has "preference" and "non-preference" students. This simply means that the Government and Bishops have agreed that the Catholic character of the school is safeguarded by not being flooded with students who are non-catholics.
If you are not a Catholic but wish your child to attend St Francis' School, then contact the Principal (Mrs Vivienne Lander) and she will tell you what the process is.
If you are a Catholic, contact Mrs Lander as well, and you will have to get a preference card signed by the priest.