(1) Under the provisions of the nondiscrimination amendment to RCW 18.85.230 (relating to the suspension, revocation or denial of real estate licenses), as enacted by the 1967 legislature, a real estate broker or salesman may receive a listing from a property owner even though the owner indicates that he desires to discriminate in the sale of his property, so long as the listing agreement does not prevent the broker or salesman from rendering all services contemplated by the listing to prospective purchasers of the property without discrimination because of race, color, creed or national origin.(2) A real estate broker or salesman is free to inquire of the owner of property previous to accepting a listing as to whether or not the owner desires to discriminate in the sale of the property.