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In legal theory, a default rule is a rule of law that can be overridden by a contract, trust, will, or other legally effective agreement. Contract law, for example, can be divided into two kinds of rules: default rules and mandatory rules. Whereas the default rules can be modified by agreement of the parties, mandatory rules will be enforced, even if the parties to a contract attempt to override or modify them. (Wikipedia)

In legal theory, a default rule is a rule of law that can be overridden by a contract, trust, will, or other legally effective agreement. Contract law, for example, can be divided into two kinds of rules: default rules and mandatory rules. Whereas the default rules can be modified by agreement of the parties, mandatory rules will be enforced, even if the parties to a contract attempt to override or modify them. (Wikipedia)

If your marriage ends, the family assets and debts that have built up during your marriage (net family property) must be divided equally. (Family Law for Women in Ontario)

Matrimonial regimes, or marital property systems, are systems of property ownership between spouses providing for the creation or absence of a marital estate, and if created, what properties are included in that estate, how and by whom it is managed, and how it will be divided and inherited at the end of the marriage. Matrimonial regimes are applied either by operation of law or by way of prenuptial agreement in civil-law countries, and depend on the lex domicilii of the spouses at the time of or immediately following the wedding. (Wikipedia)