Washington Revised Code Title 11. Probate and Trust Law § 11.98.150. Distribution of assets after one hundred fifty-year period

If, at the end of the one hundred fifty years following the effective date of an instrument creating a trust, any of the trust assets have not by the terms of the trust instrument become distributable or vested, then the assets shall be distributed as the superior court having jurisdiction directs, giving effect to the general intent of the creator of the trust or person exercising a power of appointment in the case of any further trust or other disposition of property made pursuant to the exercise of a power of appointment.