Wash. Rev. Code § 77.15.435
(1) A person is guilty of unlawfully hunting on, retrieving hunted wildlife from, or collecting wildlife parts from the property of another if the person knowingly enters or remains unlawfully in or on the premises of another for the purpose of:
(2) In any prosecution under this section, it is a defense that:
[ 2015 c 154 s 1; 2012 c 176 s 11.]