Authorizes Member States to establish a Multinational Force in Liberia to support the implementation of the 17 June 2003 ceasefire agreement, including establishing conditions for initial stages of disarmament, demobilization and reintegration activities, to help establish and maintain security in the period after the departure of the current President and the installation of a successor authority, taking into account the agreements to be reached by the Liberian parties, and to secure the environment for the delivery of humanitarian assistance, and to prepare for the introduction of a longer-term United Nations stabilization force to relieve the Multinational Force;