Furthermore, resolution 2231 (XXI) itself recalls and demands implementation of Resolution 1514(XV) (guaranteeing Gibraltar's right to self-determination) and therefore it believes that the Spanish claim for its territorial integrity (which would not be affected by Gibraltar's decolonisation) cannot displace or extinguish the rights of the people of Gibraltar under resolution 1514(XV) or under the Charter. From this point of view, any additional right that Spain could claim by virtue of the "reversionary" clause contained in the Treaty of Utrecht is overruled and annulled under article 103 of the UN Charter: " In the event of a conflict between the obligations of the Members of the United Nations under the present Charter and their obligations under any other international agreement, their obligations under the present Charter shall prevail."