RCW 9A.84.020
Failure to disperse.
(1) A person is guilty of failure to disperse if:
(a) He or she congregates with a group of three or more other persons and there are acts of conduct within that group which create a substantial risk of causing injury to any person, or substantial harm to property; and
(b) He or she refuses or fails to disperse when ordered to do so by a peace officer or other public servant engaged in enforcing or executing the law.
(2) Failure to disperse is a misdemeanor.
[ 2011 c 336 § 410; 1975 1st ex.s. c 260 § 9A.84.020.]