WAC 16-228-1550. Apparatus display sign requirements

(1) A certified applicator making a landscape application shall display the name and telephone number of the applicator or applicator's employer on any apparatus. (2) A certified applicator making a right of way application shall display the name and telephone number of the applicator or the applicator's employer and the words "vegetation management application" on any apparatus. (3) Apparatus license plates, as provided for in chapter 17.21 RCW, shall be attached to and prominently displayed on the apparatus for which they have been issued: Provided that an apparatus license plate may be affixed to a vehicle which contains the particular apparatus. Attached plates shall be clearly visible and in a location easily accessible for inspection by the department. (4) Lettering of the apparatus display signs shall be, at a minimum, two inches in height and shall be printed in color contrasting to the background.