WAC 308-330-436. Parking for certain purposes unlawful

(1) No person shall park any vehicle upon any highway for the principle purpose of: (a) Displaying advertising; (b) Displaying such vehicle for sale; (c) Selling merchandise from such vehicle, except when authorized. (2) No person shall park any vehicle upon any roadway for the principle purpose of washing, greasing, or repairing such vehicle except repairs necessitated by an emergency.