Wash. Rev. Code § 43.22.436
(1) With respect to mobile and manufactured homes that are installed in accordance with the standards adopted under RCW 43.22.440:
(a) The department shall adopt rules that:
(iii) Require the seller of a mobile or manufactured home to deliver to the buyer prior to the sale:
[ 2002 c 268 s 5.]
Purpose—Finding—Effective dates—2002 c 268: See notes following RCW 43.22.434.