The case follows concerns by IHC about disabled children being suspended for disability-related behaviour, rather than misconduct. The charity is suing the Ministry of Education, alleging state schools are illegally discriminating against disabled students.
Hawke's Bay Secondary Principals' Association president Mary Dixon, principal of Napier Girls' High School, said Hawke's Bay schools had "good processes" for students with disabilities such as Asperger's.
"It wouldn't normally result in a board hearing for any issues surrounding such a disability."
Bay schools were very caring and attended to every individual student's needs as much as possible, she said.
Secondary Principals' Association president Tom Parsons said principals were not involved in board of trustees' decisions to exclude students, but generally the safety of all students had to be weighed against individual pupils' rights.
"Unfortunately those two are not always compatible. In instances like this, sometimes the greatest good for the greatest number is paramount as far as [a board's] concerned.
"Whether or not that is supported legally is another issue."
School resources for educating disabled students in mainstream classes were "finite" and some behaviours could be unpredictable.
"If someone has got behaviour or psychological issues, that doesn't always follow a reliable pattern."
The Green Bay case was complicated, but if gross misconduct had occurred, "justice must be seen to be done", he said.
Ministry of Education guidelines stipulate no particular action or behaviour is considered gross misconduct, but it is "never trivial" and must be considered against a high threshold.