British Columbia Telephone Co. Ltd. v. The Queen, 92 DTC 6129, [1992] 1 CTC 26 (FCA) -- text
MacGuigan, J.A.:—This is a case of statutory interpretation where a technological change has occurred after the passage of a statute. The statute in question is the Income Tax Act, R.S.C. 1952, c. 148 (am. S.C. 1970-71-72, c. 63)