It's relatively simple for someone who comes before their school board, especially since, in most provinces, the majority of school boards will tell a citizen whose mother tongue may be English or an immigrant who is still not a Canadian citizen that the admissions committee has the power to admit them and that the province accepts them. The process is more generous on the ground than what is proposed in section 23 of the charter.
On October 3rd, 2017. See this statement in context.