The Office of Marine Environmental Response has published MSIB 22-20 to alert all facility response plan (FRP) holders with facilities operating within the United States Coast Guard (USCG) Sector Columbia River and Sector Puget Sound Captain of the Port (COTP) Zones of structural changes to the area contingency planning construct and physical location of applicable Area Contingency Plans (ACPs).
Source: USCG
Link: MSIB: FRP-ACP Relationships in Pacific Northwest Region – Changes to Area Contingency Planning Construct