Mo. Const. art. XI, § 10

If any railroad corporation organized under the laws of this state shall consolidate by sale or otherwise, with any railroad corporation organized under the laws of any other state, or of the United States, the same shall not thereby become a foreign corporation, but the courts of this state shall retain jurisdiction in all matters which may arise as if said consolidation had not taken place. No consolidation shall take place, except upon at least sixty days public notice to all stockholders, in the manner provided by law. [Effective - 27 Feb 1945 , see footnote]