N.D. Const. art. XI, § 1

The name of this state shall be "North Dakota." The state of North Dakota shall consist of all the territory included within the following boundary, to wit: Commencing at a point in the main channel of the Red River of the North, where the forty-ninth degree of north latitude crosses the same; thence south up the main channel of the same and along the boundary line of the state of Minnesota to a point where the seventh standard parallel intersects the same; thence west along said seventh standard parallel produced due west to a point where it intersects the twenty-seventh meridian of longitude west from Washington; thence north on said meridian to a point where it intersects the forty-ninth degree of north latitude; thence east along said line to place of beginning.