The NZ High Court "found that Green Bay High School in Auckland was not justified in excluding a student with Asperger's syndrome, following a row he had with a teacher." [see article]. This may not be over yet.
I am not a lawyer and I do not know NZ law. I know that under international law, paragraph 3 in Article 23 of the United Nations Convention on the Rights of the Child (CRoC) says every child has a right to "education, training, health care services, rehabilitation services [and] preparation for employment" ... and that "the state" is ultimately responsible for ensuring this happens. Specifically, in relation to children with a disability, the CRoC says ...
... assistance ... shall be provided free of charge ... and shall be designed to ensure that the disabled child has effective access to and receives education, training, health care services, rehabilitation services, preparation for employment and recreation opportunities in a manner conducive to the child's achieving the fullest possible social integration and individual development ...