Nothing contained in the present Charter shall authorize the United Nations to intervene in matters which are essentially within the domestic jurisdiction of any state or shall require the Members to submit such matters to settlement under the present Charter; but this principle shall not prejudice the application of enforcement measures under Chapter Vll.

High

Article 2, Chapter I, Charter of the United Nations 
http://www.un.org/en/sections/un-charter/chapter-i/index.html