The Hague Convention of 20 October 1988 on the Law Applicable to Succession to the Estates of Deceased Persons (Succession Convention)1 clarifies succession law for those who have important connections with more than one country. It provides choice-of-law rules for intestacy, and, for those who write wills, it specifies the testator's permissible choice of law. This article does not evaluate the overall desirability of the Convention, a matter currently being debated elsewhere. Rather, it concerns one aspect of the Convention that affects cases in which a testator has specified a choice of law consistent with the Convention. It discusses mandatory survivorship rules, including quasi-community laws, and considers the possible effects of the testator's choice of law on them. It then evaluates an authorized reservation to