Ron S. Maurice

The Missanabie Cree First Nation appealed a trial decision that determined the "crystallization date" for calculating their Treaty No. 9 reserve land entitlement was 1906, the year they adhered to the Treaty.

The Court of Appeal dismissed the appeal, affirming that the trial judge correctly interpreted the Treaty's reserve clause and the common intention of the parties, and properly distinguished other treaty cases.

The court also addressed ancillary issues, admitting fresh evidence of a settlement between Canada and MCFN, lifting a sealing order on the settlement, and dismissing Canada's abuse of process motion to dismiss the appeal against it.

The plaintiff First Nation brought an action against Canada and Ontario for failing to set aside a reserve for them under Treaty No. 9 in 1906.

The parties agreed that a reserve should have been set aside.

The threshold issue at trial was determining the 'crystallization date'—the point in time at which the band's population should be assessed to calculate the size of the reserve.

The plaintiffs argued the population should be determined as of the date the reserve is actually set aside or the date of the court's declaration.

The Crown argued the population should be determined as of the date the treaty was made.

The court held that the common intention of the parties, based on the text of the treaty and its historical context, was that reserves were to be set aside and sized according to the population at the time the treaty was made.