RCW 18.86.130: Exclusive real estate property marketing.

A broker may not market the sale or lease of residential real estate to a limited or exclusive group of prospective buyers or brokers, or any combination thereof, unless the real estate is concurrently marketed to the general public and all other brokers, except as reasonably necessary to protect the health or safety of the owner or occupant. Marketing to the general public does not require an owner to allow access onto the residential real estate or into the residence.