What level of communication do schools have with each other?
For example, suppose a child from school A was caught bullying students from another school (school B) and was caught going on that school's premises during school time when they should have been at their own school, what action could school B take beyond informing the child's parents or the police?
It is not like they could give a detention to a student from another school.
Could they possibly tell school A what was going on? Do schools talk to each other over things like that? Would school A have any authority to reprimand the child with detentions over something that did not happen in their school?