When an employee is pregnant or has a pregnancy-related health condition and requests a reasonable pregnancy accommodation, the employee may be required to submit written certification from their licensed physician or health care professional for those pregnancy accommodations listed in WAC 357-26-035(1) (e) through (i). An employee is not required to submit written certification for pregnancy accommodations listed in WAC 357-26-035(1)(a) through (d) or for limits lifting over seventeen pounds.
Wash. Admin. Code § 357-26-045