http://www.courts.wa.gov/court_rules/?fa=court_rules.display&group=app&set=RAP&ruleid=apprap10.06
RAP
RULE 10.6
AMICUS CURIAE BRIEF
(a) When Allowed by Motion. The appellate court may, on
motion, grant permission to file an amicus curiae brief only
if all parties consent or if the filing of the brief would
assist the appellate court. An amicus curiae brief may be
filed only by an attorney authorized to practice law in this
state, or by a member in good standing of the Bar of another
state in association with an attorney authorized to practice
law in this state.
(b) Motion. A motion to file an amicus curiae brief must
include a statement of (1) applicants interest and the
person or group applicant represents, (2) applicants
familiarity with the issues involved in the review and with
the scope of the argument presented or to be presented by
the parties, (3) specific issues to which the amicus curiae
brief will be directed, and (4) applicants reason for
believing that additional argument is necessary on these
specific issues. The brief of amicus curiae may be filed
with the motion.
(c) On Request of the Appellate Court. The appellate
court may ask for an amicus brief at any stage of review,
and establish appropriate timelines for the filing of the
amicus brief and answer thereto.
(d) Objection to Motion. An objection to a motion to
file an amicus curiae brief must be received by the
appellate court and counsel of record for the parties and
the applicant not later than 5 business days after receipt
of the motion.
(e) Disposition of Motions. The Supreme Court and each
division of the Court of Appeals shall establish by general
order the manner of disposition of a motion to file an
amicus curiae brief, including whether such disposition is
reviewable or subject to reconsideration by the particular
court.
(Amended September 1, 1999.)
