Union Pacific Railroad Co. v. Brotherhood of Locomotive Engineers

Union Pacific Railroad v. Brotherhood of Locomotive Engineers, 558 U.S. 67 (2009), was a United States Supreme Court in which the court held that, given that nothing in the Railway Labor Act elevates to jurisdictional status the obligation to conference minor disputes or to prove conferencing, it is incorrect to treat the limited statutory grounds for relief in the act as a constitutional due process issue.

Source: Wikipedia — Union Pacific Railroad Co. v. Brotherhood of Locomotive Engineers (CC BY-SA 4.0)