text: @skyeofblue. 
  
  As reported in the Globe back in 2014
  
  "Under section 43 of the 1982 Constitution, the amending procedure for making section 93 of the 1867 Constitution (the provision requiring Ontario to fund Catholic schools) inapplicable to Ontario requires only that the Ontario’s legislature and the federal Parliament pass resolutions to that effect.
  If Ontario wanted to do this, it would be inconceivable that the federal Parliament would deny this change"
  
  Basically you just need enough votes to pass it - if any party was willing to propose it of course.