The OP didn't copy and paste the rest of the rule change FYI:

Other information: Though the regulations on the river have required sport anglers to release wild chinook during the summer months for several years, the stock continues to be under-escaped and additional measures are necessary to help recover the stock.
The Hoh Tribe has also proposed a fishing schedule that reduces their impacts on wild spring/summer chinook; and Olympic National Park is closing the watershed to fishing.
Information Contact: Steve Thiesfeld, (360) 249-1201; Mike Gross, (360) 249-1210.