What is the testator's obligation to make provision for the dependent spouse after his death?

In the leading case of Tataryn v. Tataryn Estate, 1994 CanLII 51 (SCC), [1994] 2 S.C.R. 807 at 820-821, Madam Justice McLachlin, as she then was, stated: If the phrase "adequate, just and equitable" is viewed in light of current societal norms, much of the uncertainty disappears. Furthermore, two sorts of norms are available and both must be addressed. The first are the obligations which the law would impose on a person during his or her life were the question of provision for the claimant to arise. These might be described as legal obligations. The second type of norms are found in society's reasonable expectations of what a judicious person would do in the circumstances, by reference to contemporary community standards. These might be called moral obligations, following the language traditionally used by the courts. Together, these two norms provide a guide to what is "adequate, just and equitable" in the circumstances of the case. At 822-823, she stated: For further guidance in determining what is "adequate, just and equitable", the court should next turn to the testator's moral duties toward spouse and children. It is to the determination of these moral duties that the concerns about uncertainty are usually addressed. There being no clear legal standard by which to judge moral duties, these obligations are admittedly more susceptible of being viewed differently by different people. Nevertheless, the uncertainty, even in this area, may not be so great as has been sometimes thought. For example, most people would agree that although the law may not require a supporting spouse to make provision for a dependent spouse after his death, a strong moral obligation to do so exists if the size of the estate permits. Similarly, most people would agree that an adult dependent child is entitled to such consideration as the size of the estate and the testator's other obligations may allow. While the moral claim of independent adult children may be more tenuous, a large body of case law exists suggesting that, if the size of the estate permits and in the absence of circumstances which negate the existence of such an obligation, some provision for such children should be made...