RCW 11.98.130: Rule against perpetuities.

No provision of an instrument creating a trust, including the provisions of any further trust created, and no other disposition of property made pursuant to exercise of a power of appointment granted in or created through authority under such instrument is invalid under the rule against perpetuities, or any similar statute or common law, during the one hundred fifty years following the effective date of the instrument.

Thereafter, unless the trust assets have previously become distributable or vested, the provision or other disposition of property is deemed to have been rendered invalid under the rule against perpetuities.