The rules at Notre Dame school

Pupils aren't allowed to run on the playground but they are allowed to run during sport lesson.
Pupils aren't allowed to eat in the classroom but they are allowed to eat on the playground.
Pupils aren't allowed to use a mobile phone but they are allowed to bring a mobile phone.
Pupils aren't allowed to stand up during lesson but they are allowed to stand up when the headmaster comes into the classroom.
Boys aren't allowed to have earrings but Girls are allowed to have earrings.