The legal cell of the school or a very able LOCAL counsel of unshakable repute and integrity specializing in concerned field of law e.g; Labor/service matters as in your case, and well versed with LOCAL applicable rules, precedence, latest judgments etc …. and worth his/her salt, after examining all related case might have already advised in affirmative.
There are such very able counsels at each location.
Check for such counsels at LOCAL Labor court/CGIT, School-Educational tribunal, CAT,civil courts, HC, SC…
If you are from employee’s side the seasoned employee’s/trade union leaders and a very able LOCAL counsel engaged by unions or employee, as already suggested might have already opined in affirmative.