Is it permissible for me to adhere to school regulations that do not allow the niqab, knowing that I will face a major problem if I ask my family to quit studying because of it, or can I wear the niqab outside school and remove it upon entering, or should I not wear it at all until I complete my studies and then wear it afterwards?

A mature girl must cover her entire body, including her face, from non-mahram men, whether in the street, school, or elsewhere.

The girl should strive to convince her parents to study in a non-mixed school or through distance learning to avoid sin.

If the family insists on studying in a mixed school, and it is not possible to transfer to another, then it is necessary to wear the niqab outside the school as long as the girl is able to do so. This is because her shortcoming or necessity to remove it inside the school does not permit removing it outside, as Allah Almighty says: (So fear Allah as much as you are able).