Rule against perpetuities
Historical background

The rule against perpetuities is closely related to another doctrine in the common law of property, the rule against unreasonable restraints on alienation. Both stem from an underlying principle or reference in the common law disapproving of restraints on property rights. However, while a violation of the rule against perpetuities is also a violation of the rule against unreasonable restraints on alienation, the reciprocal is not true. As one has stated, "The rule against perpetuities is an ancient, but still vital, rule of property law intended to enhance marketability of property interests by limiting remoteness of vesting." For this reason, another court has declared that the provisions of the rule are predicated upon "public policy" and thus "constitute non-waivable, legal prohibitions."
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