Wash. Admin. Code § 220-358-030
It is unlawful to fish for salmon in the lower Columbia River for commercial purposes or to possess salmon taken from those waters for commercial purposes, except as provided in this section:
Gear
(4) From December 1 through March 31 it is lawful for salmon fishers to have smelt or sturgeon gillnets aboard while fishing for salmon.
Fishing periods
(5) The lower Columbia River is closed to commercial salmon fishing, except as provided by emergency rule of the director.
General
(6) Unless otherwise specified by emergency rule of the director, the following areas of the lower Columbia River remain closed during open salmon fishing periods:
[Statutory Authority: RCW 77.04.012, 77.04.013, 77.04.020, 77.04.055, and 77.12.047. WSR 17-05-112 (Order 17-04), recodified as § 220-358-030, filed 2/15/17, effective 3/18/17. Statutory Authority: RCW 77.12.047. WSR 07-09-055 (Order 07-60), § 220-33-010, filed 4/12/07, effective 5/13/07; WSR 00-17-117 (Order 00-146), § 220-33-010, filed 8/17/00, effective 9/17/00. Statutory Authority: RCW 75.08.080. WSR 88-18-066 (Order 88-86), § 220-33-010, filed 9/2/88.]