 However, in the Munn case, the Court ruled that all property was held subject to legislative regulation if it was "affected with a public interest".Further decisions built off the Munn decision, specifying that while the legislature may regulate property "affected by the public interest", they must exercise it reasonably by applying the used and useful principle, so as to not deprive citizens of their property without due process of law.The maximum rate law was contested by the Union Pacific, St. Joseph and Grand Island Railway, Omaha and Republican Valley Railway, and the Kansas City and Omaha Railway.