Wash. Rev. Code § 26.09.480
(1) A party objecting to the intended relocation of the child or the relocating parent's proposed revised residential schedule shall do so by filing the objection with the court and serving the objection on the relocating party and all other persons entitled by court order to residential time or visitation with the child by means of personal service or mailing by any form of mail requiring a return receipt to the relocating party at the address designated for service on the notice of intended relocation and to other parties requiring notice at their mailing address. The objection must be filed and served, including a three-day waiting period if the objection is served by mail, within thirty days of receipt of the notice of intended relocation of the child. The objection shall be in the form of:
[ 2000 c 21 s 10.]
Intent—Captions not law—2000 c 21: See notes following RCW 26.09.405.