Hmmm, just out that MA 12 will open 24 June, MA 11 on 16 June, MA 4 and 5 on 16 June and that portion of MA 9 just north of the Hood Canal bridge will open on 24 June (http://wdfw.wa.gov/fishing/shellfish/crab/).

No info as to why but one might speculate that it is to ensure that non-tribal harvesters have reasonable opportunity to harvest the State's 50% in specific management areas.