Wash. Rev. Code § 47.52.220
(1) The department shall authorize an off and on approach to partially controlled limited access highways for the placement and service of facilities providing personal wireless services.
(2) The department shall authorize the approach by an annual permit, which may only be canceled upon one hundred eighty days' written notice to the permit holder.
(3) For the purposes of this section:
[ 2003 c 188 s 2.]