Which law may govern a cross-border family's succession, matrimonial property and divorce — and whether NATIONALITY opens an election. Given the nationalities held, habitual residence, asset situs and marital status, returns: the default applicable law (EU Succession Regulation 650/2012 Art 21 habitual residence; Swiss PILA last domicile), which instruments are in scope for that fact pattern (650/2012 Art 22; Matrimonial Property Reg 2016/1103 Art 22, 18 participating states only; Rome III 1259/2010 Art 5, 17 states, bilateral agreement required; Swiss professio juris Arts 90-91 rev-PILA), the elections actually available, the hard TIMING rules (2016/1103 and Rome III require the nationality at the time of the agreement — no retrospective cure; Swiss professio juris is VOID if Swiss nationality is later acquired), situs overrides such as French Code civil art. 913 al. 3, and the real trade-off: electing a common-law system generally exchanges a FIXED reserved share for a DISCRETIONARY family-provision claim, it does not remove family claims. Explicitly returns a no-useful-election result where nationality opens nothing. Nationality alone achieves nothing — every election requires a properly executed declaration or agreement. INFORMATION ONLY, NOT LEGAL ADVICE: Mirabello gives no legal opinion and no tax advice; instruct qualified counsel in every relevant jurisdiction. STATELESS — pass ISO alpha-2 codes only, never personal data.
