What is the test for equality in s. 15 of the Charter?

The most authoritative case in Canada with respect to the interpretation and application of s. 15 (1) of the Charter in Andrews v. Law Society of British Columbia, supra. McIntyre J., in dealing with the "concept of equality", made the following statement at p. 11: To approach the ideal of full equality before and under the law — and in human affairs an approach is all that can be expected — the main consideration must be the impact of the law on the individual or the group concerned.