RCW 69.04.820

For the purpose of enforcing the provisions of this chapter, the director is authorized (1) to enter, at reasonable times, any factory, warehouse, or establishment subject to this chapter, or to enter any vehicle being used to transport or hold drugs, devices, or cosmetics in intrastate commerce; and (2) to inspect, at reasonable times, such factory, warehouse, establishment, or vehicle and all pertinent equipment, finished and unfinished materials, containers, labeling, and advertisements therein.