In this regard, the Security Council notes that there is a wide variety of arrangements and relationships which have developed in different instances of cooperation between the United Nations, Member States and regional and subregional organizations in the maintenance of peace and security, and that monitoring requirements will vary and should be tailored according to the specifics of the operations in question, including in relation to ongoing peace efforts. But in general operations should have a clear mandate, including a statement of objectives, rules of engagement, a well-developed plan of action, a time-frame for disengagement, and arrangements for regular reporting to the Council. The Council affirms that a high standard of conduct is essential for successful operations, and recalls the role of the United Nations in setting general standards of peacekeeping. The Council stresses that missions and operations must ensure that their personnel respect and observe international law, including humanitarian, human rights and refugee law.