Wash. Admin. Code § 250-18-030
The domicile of any person shall be determined according to the individual's overall situation and circumstances and is not determined on the basis of a single factor; nor is a predetermined number of factors required. Institutions shall require evidence of a Washington domicile that is of sufficient quantity and quality to negate the existence of a domicile in a state other than Washington.
A nonresident student who is enrolled for more than six hours per semester or quarter shall be presumed to be in the state of Washington for primarily educational purposes. Such period of enrollment shall not be counted toward the establishment of a bona fide domicile of one year in this state unless such student proves that the student has, in fact, established a bona fide domicile in this state primarily for purposes other than educational. The burden of proof that a person has established a domicile in the state of Washington primarily for purposes other than educational lies with the student.
To aid the institutions in determining whether a person has established a bona fide domicile in the state of Washington primarily for purposes other than educational, factors such as those listed in subsections (1) through (14) of this section are to be considered. The weight assigned to any given factor should depend on the ease with which it might be established and the degree to which it demonstrates commitment to domicile as a matter of common sense and as part of the individual's overall circumstances. Factors include, but are not limited to:
[Statutory Authority: RCW 28B.15.012, 28B.15.013, and 28B.15.015. WSR 17-05-060, § 250-18-030, filed 2/10/17, effective 3/13/17. Statutory Authority: RCW 28B.15.015. WSR 03-13-056, § 250-18-030, filed 6/13/03, effective 7/14/03. Statutory Authority: 1982 1st ex.s. c 37 § 4. WSR 83-13-092 (Order 2-83, Resolution No. 83-65), § 250-18-030, filed 6/17/83; WSR 82-19-015 (Order 10-82, Resolution No. 83-1), § 250-18-030, filed 9/8/82.]