The Canadian Government is taking issue with a pipeline shutdown order from Michigan’s Governor…and they’re taking it to court.

Officials from Ottawa cited a 1977 pipelines treaty on Monday as they asked a US Federal Judge to halt any consideration of Governor Whitmer’s order to shut down the Line 5 oil and gas pipelines.

The pair of decades-old pipelines, located in the Straits of Mackinac, have been at the center of disputes between the two countries, many revolving around safety and the potential for a large oil spill in The Great Lakes.

The Detroit Free Press reports that Michigan seeks to remand the federal case back to Michigan courts.