The Queen v. Cie Imm. BCN Ltée, 79 DTC 5068, [1979] CTC 71, [1979] 1 S.C.R. 865 -- summary under Disposition of Property

The verb "to dispose" (which should receive the same meaning as the expressions "disposition", "proceeds of disposition" and " disposed of") should be given the broadest possible meaning, and encompasses the idea of destruction or extinguishment. The acquisition by a lessee of the lessor's interest led to the extinguishment or "disposition" of the lessee's leasehold interest for the purposes of Regulation 1100(2) (since repealed). In addition, the transfer of full ownership rights in a building subject to the obligation of the transferee to demolish the building, was a disposition of that building.