/rul əˈɡɛnst ˌpɛr.pɪˈtu.ɪtiz/ – Phrase
Definition: Nguyên tắc chống việc kéo dài mãi mãi.
A more thorough explanation: a rule of law that limits the duration of a trust
Example: The rule against perpetuities is, in effect, an overall time limit within which any direction by the settlor must take effect.