The defining case was "Mahe v. Alberta" (1990), in which the Supreme Court of Canada declared that section 23 guaranteed a "sliding scale". In certain circumstances, the children whose parents could exercise the right might be so few that literally no minority language education may be provided by the government. With a greater number of children, some schools might be required to provide classrooms in which the children could receive minority language education. An even greater number would require the construction of new schools dedicated solely to minority language education. More recent cases, which have significantly extended these rights, include "Arsenault-Cameron v. Prince Edward Island" (2000) and "Doucet-Boudreau v. Nova Scotia (Minister of Education)" (2003).