Wash. Admin. Code § 357-01-228
A biological, adoptive, de facto, or foster parent, step-parent, or legal guardian of an employee's spouse or an employee's registered domestic partner or a person who stood in loco parentis to an employee's spouse or to an employee's registered domestic partner when the employee's spouse or the employee's registered domestic partner was a child. A person who had day-to-day responsibilities to care for and financially support the employee's spouse or the employee's registered domestic partner when they were a child is considered to have stood in loco parentis to the employee's spouse or to the employee's registered domestic partner.
Wash. Admin. Code § 357-01-228
Statutory Authority: Chapter 41.06 RCW. 10-17-061, § 357-01-228, filed 8/13/10, effective 9/15/10; 09-17-057 and 09-18-112, § 357-01-228, filed 8/13/09 and 9/2/09, effective 12/3/09; 05-12-093, § 357-01-228, filed 5/27/05, effective 7/1/05.