Wash. Rev. Code § 70.54.500
(1) The definitions in this subsection apply throughout this section unless the context clearly requires otherwise.
(2) A shipper or consignee required to provide a restroom by rules authorized under chapter 49.17 RCW must allow a motor carrier delivering goods to or picking goods up from a shipper or consignee to use that restroom during normal business hours if:
(4) A shipper or consignee or an employee of a shipper or consignee is not civilly liable for any act or omission in allowing a motor carrier to use a restroom if the act or omission:
(5)
[ 2023 c 251 s 1.]