PORTLAND, Maine — A federal court order has been issued outlining the dates by which the boundary lines for Maine’s two congressional districts must be redrawn.

In an order filed Wednesday in U.S. District Court in Portland, Judge George Singal writes that the Maine Legislature should complete its redistricting work by Sept. 30. If the Legislature can’t complete the task, the Maine Supreme Judicial Court has until Nov. 15 to finish the reapportionment.

The order says if a redistricting plan based on 2010 census data isn’t adopted within those deadlines, the federal court will proceed with its own reapportionment of the districts.

Singal and two other judges ruled this month that Maine’s congressional districts are unconstitutional based on the latest census data and must be redrawn before the 2012 congressional elections.