Wash. Admin. Code § 308-330-436
(1) No person shall park any vehicle upon any highway for the principle purpose of:
[Statutory Authority: RCW 46.90.010. WSR 97-10-068, § 308-330-436, filed 5/5/97, effective 6/5/97; WSR 94-01-082, § 308-330-436, filed 12/13/93, effective 7/1/94.]