I think it has to be based on part VII of the Official Languages Act.
Part VII identifies important factors. One such factor is the education continuum. We know that the quality of an educational system is a contributing factor to linguistic vitality. It's also affected by immigration policy, which has a demographic and linguistic impact. Then there's the matter of the number of eligible children.
So some important factors are mentioned in part VII, and they should be the basis for reviewing the impact of part VII on official language minority communities. This would determine whether the positive measures introduced have had an impact on the development of these communities, as required under the act.