MidstreamCanada invokes treaty from the seventies to prevent Line 5 shutdowneditorOctober 4, 2021October 4, 2021 by editorOctober 4, 2021October 4, 20210417 Canada formally invoked a treaty from the 1970s to prevent the U.S. government from disrupting operations at Line 5, Enbridge’s infamous pipeline. Gordon Giffin, counsel...