“Our view on this principal issue may be summarized as follows. Section 15(1) of the Charter is infringed by the definition of “spouse” in s. 29 of the FLA. This definition, which only applies to Part III of the FLA, draws a distinction between individuals in conjugal, opposite-sex relationships of a specific degree of duration and individuals in conjugal, same-sex relationships of a specific degree of duration. We emphasize that the definition of “spouse” found in s. 1(1) of the FLA, and which applies to other parts of the FLA, includes only married persons and is not at issue in this appeal. Essentially, the definition of “spouse” in s. 29 of the FLA extends the obligation to provide spousal support, found in Part III of the FLA, beyond married persons to include individuals in conjugal opposite-sex relationships of some permanence. Same-sex relationships are capable of being both conjugal and lengthy, but individuals in such relationships are nonetheless denied access to the court-enforced system of support provided by the FLA. This differential treatment is on the basis of a personal characteristic, namely sexual orientation, that, in previous jurisprudence, has been found to be analogous to those characteristics specifically enumerated in s.15(1).
The crux of the issue is that this differential treatment discriminates in a substantive sense by violating the human dignity of individuals in same-sex relationships. As Law v. Canada (Minister of Employment and Immigration), 1999 CanLII 675 (SCC), [1999] 1 S.C.R. 497, established, the inquiry into substantive discrimination is to be undertaken in a purposive and contextual manner. In the present appeal, several factors are important to consider. First, individuals in same-sex relationships face significant pre-existing disadvantage and vulnerability, which is exacerbated by the impugned legislation. Second, the legislation at issue fails to take into account the claimant’s actual situation. Third, there is no compelling argument that the ameliorative purpose of the legislation does anything to lessen the charge of discrimination in this case. Fourth, the nature of the interest affected is fundamental, namely the ability to meet basic financial needs following the breakdown of a relationship characterized by intimacy and economic dependence. The exclusion of same-sex partners from the benefits of the spousal support scheme implies that they are judged to be incapable of forming intimate relationships of economic interdependence, without regard to their actual circumstances. Taking these factors into account, it is clear that the human dignity of individuals in same-sex relationships is violated by the definition of “spouse” in s. 29 of the FLA.”
M. v. H., [1999] 2 SCR 3, 1999 CanLII 686 (SCC) per Cory & Iacobucci JJ at 2-3