La Charte de l'Eau du Bassin du Niger (April 30, 2008) Countries/Territories Entry into force Simple signature Benin - Apr 30, 2008 Côte d'Ivoire - Apr 30, 2008 Mali - Apr 30, 2008 Niger - Apr 30, 2008 Chad - Apr 30, 2008 Burkina Faso - Apr 30, 2008 Guinea - Apr 30, 2008 Nigeria - Apr 30, 2008 Cameroon - Apr 30, 2008