Wash. Admin. Code § 392-190-048
At least annually, each school district and public charter school must review data on corrective and disciplinary actions taken against students within each school disaggregated by sex, race, limited-English proficiency (i.e., English language learners), and disability, including students protected under Section 504 of the Rehabilitation Act of 1973 and the Individuals with Disabilities Education Act. This review must include, but is not limited to, short-term suspensions, long-term suspensions, expulsions, and emergency expulsions. In reviewing this data, each school district or public charter school must determine whether it has disciplined or applied corrective action to a substantially disproportionate number of students within any of the categories identified in this section. If a school district or public charter school finds that it has disciplined or applied corrective action to a substantially disproportionate number of students who are members of one of the categories identified in this section, the school district or charter school must take prompt action to ensure that the disproportion is not the result of discrimination.
Wash. Admin. Code § 392-190-048