Nothing in RCW
11.110.200 through
11.110.260 shall limit the power of a person who creates a trust after June 10, 1971 or the power of a person who has retained or has been granted the right to amend a trust created before June 10, 1971, to include a specific provision in the trust instrument or an amendment thereto, as the case may be, which provides that some or all of the provisions of RCW
11.110.210 and
11.110.220 shall have no application to such trust.