What is the requirement of procedural fairness in the law of Canada?

The requirement of procedural fairness first introduced in Canada in Nicholson is now firmly established in the law of Canada. Laskin, C.J.C., in Nicholson stated at page 680: “. . . I accept, therefore, for present purposes and as a common law principle what Megarry, J., accepted in Bates v. Lord Hailsham of St. Marylebone (1972), 1 W.L.R. 1373, at p. 1378, ‘that in the sphere of the so-called quasi-judicial the rules of natural justice run, and that in the administrative or executive field there is a general duty of fairness.”