Washington Revised Code Title 11. Probate and Trust Law § 11.98.045. Criteria for transfer of trust assets or administration

(a) The transfer would facilitate the economic and convenient administration of the trust;

(b) The transfer would not materially impair the interests of the qualified beneficiaries or others interested in the trust;

(c) The transfer does not violate the terms of the trust;

(d) The new trustee is qualified and able to administer the trust or such assets on the terms set forth in the trust; and

(e) The trust meets at least one condition for situs listed in RCW 11.98.005(1) with respect to the new jurisdiction.