Law Resources

RCW 17.10 (Revised Code of Washington) This is the state's basic weed law.

http://apps.leg.wa.gov/rcw/default.aspx?cite=17.10

The Washington Administrative Code (WAC) contains the rules and regulations for carrying out the state law.

WAC Chapter 16-750 includes the state Noxious Weed List, definitions and descriptions of region boundaries for Class B Weeds, and the schedule of monetary penalties.
http://apps.leg.wa.gov/WAC/default.aspx?cite=16-750

WAC Chapter 16-752 describes the quarantine list maintained by the state Department of Agriculture.
http://apps.leg.wa.gov/WAC/default.aspx?cite=16-752

The state law that calls for the creation and maintenance of the quarantine list is RCW 17.24.  The link to the State's Quarantine List is
http://www.nwcb.wa.gov/searchResultsQuarantine.asp

State Class A list 
http://www.nwcb.wa.gov/class-a-noxious-weeds

State Class B List
http://www.nwcb.wa.gov/class-b-noxious-weeds

State Class C List
http://www.nwcb.wa.gov/class-c-noxious-weeds