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:

(1) It is unlawful to use a gillnet to fish for salmon if the net exceeds 1,500 feet in length along the cork line.

(2) It is unlawful to use a gillnet to fish for salmon with mesh size larger than 9 3/4 inches.

(3) It is unlawful to use a gillnet to fish for salmon if the lead line weighs more than two pounds per fathom of net as measured on the cork line, provided that it is lawful to have a gillnet with a lead line weighing more than two pounds per fathom aboard a vessel when the vessel is fishing in or transiting through the Tongue Point Select Area, and it is also lawful to have additional weights and anchors attached directly to the lead line in the Deep River, Blind Slough, Knappa Slough and South Channel Select Areas.

(4) From December 1 through March 31 it is lawful for salmon fishers to have smelt or sturgeon gillnets aboard while fishing for salmon.

(5) The lower Columbia River is closed to commercial salmon fishing, except as provided by emergency rule of the director.

(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:

(a) All tributaries flowing into the lower Columbia River.

(b) Grays Bay sanctuary.

(c) Elokomin-A sanctuary.

(d) Cowlitz sanctuary.

(e) Kalama-A sanctuary.

(f) Lewis-A sanctuary.

(g) Washougal sanctuary.

(h) Big Creek sanctuary.

(i) Sandy River sanctuary.