It has since been accepted in the 1989 Guinea-Bissau/Senegal case that a colony gaining independence need not be bound by agreements concluded by the imperial power. [1] Borders have never in the past been fixed, they have changed usually as a result of conflict but also more peaceful changes such as demarcation or unification. African states should not be binding themselves to an out of date territorial system forced upon them by their imperial oppressors.  [1] Ratner, 1996, p.620