WAC 357-01-227
WAC 357-01-227. Parent
A biological, adoptive, de facto, or foster parent, step-parent, or legal guardian of an employee or the employee's spouse or registered domestic partner, or a person who stood in loco parentis to an employee when the employee was a child. A person who had day-to-day responsibilities to care for and financially support the employee when they were a child is considered to have stood in loco parentis to the employee.