http://www.casselsbrock.com/files/file/docs/On%20the%20Rocks_%20The%20Gold%20Seal%20Case_AQ36-3Blue.pdf
Specifically the fourth paragraph by Ian Blue: "Duff’s story now opens the Gold Seal Interpretation to the argument that having advised the Crown, ex parte, and then having sat in judgment, Anglin J. and Mignault J. were effectively committed to dismissing Gold Seal’s appeal. While no one knows how their advocacy may have influenced the other judges, it cannot be presumed that it had no effect. Being bound by Anglin’s and Mignault’s commitment, the court’s disposition of the s. 121 argument cannot now be regarded as a sound interpretation of an important provision of the Canadian constitution."