Paid sick leave (effective January 1, 2018):
Most workers earn a minimum of one hour of paid sick leave for every 40 hours worked. This leave may be used beginning on the 90th calendar day of
employment. Employers must provide employees with a statement that includes their accrued, used and available hours of this leave at least once per month. This information may be provided on your regular pay statement or a separate notification. Workers must be allowed to carry over a minimum of 40 hours of this unused leave to the following year. See www.Lni.wa.gov/SickLeave for details on authorized usage, accrual details and eligibility
See https://www.lni.wa.gov/IPUB/700-074-909.pdf to view the posters in their entirety.