United Nations Security Council resolution 1528, adopted unanimously on 27 February 2004, after recalling resolutions 1464 (2003), 1479 (2003), 1498 (2003), 1514 (2003) and 1527 (2004) on the situation in Côte d'Ivoire (Ivory Coast), the council established the United Nations Operation in Côte d'Ivoire (UNOCI) for an initial period of twelve months.

[1] The Security Council endorsed the Linas-Marcoussis Agreement and welcomed progress relating to disarmament, demobilisation and reintegration (DDR), and the return of the Forces Nouvelles to the government, including dialogue.

Acting under Chapter VII of the United Nations Charter, the council established UNOCI for an initial period of twelve months from 4 April 2004 compromising of 6,240 United Nations personnel including 200 military observers and 320 police in addition to a civilian, judiciary and corrections component.

UNOCI's mandate would involve the monitoring of armed groups and the ceasefire; a disarmament, demobilisation, reintegration, repatriation and resettlement programme; protecting United Nations personnel and civilians; supporting the implementation of the peace process; promoting human rights; utilising a public information capacity and maintaining law and order.

The resolution stressed the importance of the full implementation of the Linas-Marcoussis Agreement and for the Ivorian parties to guarantee the safety and freedom of movement of UNOCI personnel.