Law Dictionary

rule against perpetuities

often capitalized R&P

legal Definition of rule against perpetuities

: a common-law rule stating that in order for a future interest to be good it must vest after its creation (as at the death of a testator) within a life in being or lives in being plus 21 years plus the period of gestation of any beneficiary conceived but not yet born — compare life in being, statutory rule against perpetuities, wait and see

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