. . . "(c) Sells or offers for sale any safety belt, safety harness, child safety system, anchor or other device for attaching or securing safety belts, safety harnesses or child safety systems if the belt, harness, child safety system, anchor or device is not marked as required under ORS 815.055 and if the mark is not legible when the belt, harness, child safety system, anchor or other device is used or" .