The authority granted to a commander to direct forces assigned so that the commander may accomplish specific missions or tasks which are usually limited by function, time or location by troop-contributing countries in the Security Council Resolution/mandate, to deploy units and retain or assign tactical control of those units; it is a more restrictive level of authority than operational command: a commander cannot change the mission of those forces or deploy them outside the area of responsibility previously agreed to by the troop-contributing country without the prior consent of this country; further he cannot separate contingents by assigning tasks to components of the units concerned.