I have something to say as far as shedding light on the definition of a rights holder goes. It's even broader than we heard.
First, the Supreme Court determined that school boards have the authority to grant the right, and the provinces work with them. They understand the principle.
It can work other ways, though. Consider this scenario: two anglophones in Nova Scotia who don't speak a word of French and the parents move to Quebec. The children attend school in French in Quebec for one term. When the family returns to Nova Scotia, the children are rights holders, and they automatically get to do their schooling in French.