It depends. You have a right to enrol in a single-sex school that matches your identity because of anti-discrimination laws explained above.
New Zealand law allows for single-sex schools which is why all-boys schools do not have to enrol girls, for example. However, the Minister of Education can allow a certain number of boys to enrol at a girls’ school and vice versa.
So, if you are attending a girls’ school and beginning to transition and/or identify as trans, you can stay at your current school. You will need to talk to your school about this, as the Education and Training Act sets out a process to follow.
Schools usually ask all students for evidence of identity, like your birth certificate or passport. A school can’t ask you for extra evidence that they’re not asking of other students.
The school can ask for proof of your intention to transition (medical evidence) when you enrol if your identity documents do not show your correct gender marker. If you have legally updated your gender, you do not need to provide the school with medical evidence for this.