The use of force
Question  1:
  How  does the tension between, on the one hand, considerations of order and  stability and, on the other, overall notions of justice manifest itself in the  international regulation of the use of force?
  
Guidance:
  The question asks the students to consider the ways in  which the regulation of the use of force reflect a tension between what may be  perceived to be “just” and what is required to ensure international order and  stability. At the outset it can be noted that the book states how the adoption  of the UN Charter was motivated by a desire to create stability and to prevent  the use of unilateral force and that all other considerations remained  secondary. This, of course, illustrates the overall priority given to  stability. The importance attached to stability and order is also reflected in  the prohibition on the use of force in art. 2 (4) of the Charter that is  generally interpreted to cover all instances of the use of force. Another example  is the power of the veto granted to the five permanent members of the Security  Council. As the book notes, the purpose of the veto is in part motivated by a  desire to ensure that the international peace and security are best maintained  by ascertaining that the five states agree on resort to the use of force.  It also bears noting that the Security Council is generally competent to  authorize the measures they find are required to uphold international peace and  security and that all states are obliged to carry out the decisions of the  Council. The priority given to stability is also reflected in the regulation of  the unilateral use of force. The right to self-defense, for example, is not  triggered until an armed attack occurs. In addition, to quality as an armed  attack, a use of force must be of a certain gravity and the exercise of  self-defense must comply with the dual conditions of necessity and  proportionality. The perhaps best example of the tension between stability and  notions of “justice”, however, is the discussion of the right to humanitarian  intervention without a mandate from the UN Security Council; see more under  Question 7. 
Question  2: 
  The  UN Security Council has primary responsibility for the maintenance of  international peace and security and has therefore been vested with certain  powers. Are there any limits to what the Council can authorize? 
Guidance: 
  The question concerns the extent of the Security  Council’s powers under Chapter VII. The book notes that the authority of the  Security Council is not unlimited. Although art. 103 of the Charter specifies  that obligations under the Charter prevail if they conflict with obligations  under any other international agreement, it was noted in the discussion in  Chapter 2 that the Council cannot oblige states to disregard norms of a jus cogens/peremptory character. The  book also makes references to the issue of the Council’s sanctions and listing  regime and what was a lack of concern for due process guarantees.
Question  3:
  What  legal authority does a regional organization, such as NATO, possess with regard  to the use of force? 
Guidance:
  The question asks the students to consider a regional  organization’s relationship to the UN Charter. The book notes that the Security  Council may utilize ‘regional arrangements or agencies for enforcement action  under its authority’ (see Art. 53 of the Charter). But regional organizations  do not possess more authority that their individual member states and regional  enforcement is therefore also contingent on authorization from the Security  Council or on the existence of a basis for using lawful self-defense.
Question  4:
  Why  is the notion of ‘implied authority’ of the use of force in Security Council  resolutions controversial? 
Guidance:
  The question concerns the controversial question of  what the book refers to as “implied authority”. The book notes that states have  at times sought to justify their uses of force on a sort of implied authority  from the Security Council and it explicitly refers to the debate about the authority  for the US/UK led invasion of Iraq in 2003. The book also notes that the  reliance on implied authority is highly controversial because there is an  assumption that a resolution from the Council should give a clear indication if  it is to be interpreted as authorizing the use of force. A reference could be  made to the discussion of the authorization of the air campaign in Libya in  2011 and the fact that the Council now is very careful in how they draft and  articulate their resolutions.
Question  5:
  According  to the text, the so-called ‘accumulation of events’ doctrine is controversial.  Why is that the case? 
Guidance:
  The question asks the students to consider the  “accumulation of events” doctrine in light of the overall purposes of the  regulation of the use of force. The book notes the argument that a series of  small-scale attacks not individually of sufficient gravity to constitute an  armed attack for the purposes of Art. 51 of the Charter may be weighed  cumulatively. It also notes that the ICJ seems to have implicitly endorsed the  doctrine. The doctrine remains controversial, however, and that is due to a  number of reasons. First, accepting the doctrine will lead to a widening of the  range of permissible use of force in self-defense and therefore also to a more  general greater tolerance for the unilateral use of force. Second, the  accumulation of events theory complicates the application of the principle of  proportionality because it may make it more difficult to measure the armed  attack that gave rise to the right to use self-defense. Third, the accumulation  of events doctrine may also raise issues in relation to the distinction between  the lawful exercise of self-defense and the initiation of (unlawful) armed  reprisals. 
Question  6:
  In  what regard has the threat from terrorism led to uncertainty about the applicability  of the right to self-defense under article 51? 
Guidance:
  The question asks the students to consider the  application of the regulation of the use of force to international terrorism.  The book refers to a number of ways whereby the fight against terrorism has  complicated the proper application of the regulation of the use force. One  issue concerns the qualification of an armed attack under Art. 51. When can  international terrorism trigger a right to self-defense? How grave must  terrorist acts be to constitute an armed attack? Reference should here be made  to the “accumulation of events” doctrine mentioned in the previous question. It  has also been a matter of much debate if Art. 51 can be relied upon in response  to terrorist acts perpetrated by non-state actors. The book notes that the  international reaction to the 11 September 2001 attacks could be taken as an  indication that a right to self-defense against private actors do exist. The  book here refers to the so-called “unable and unwilling” test that appears to  have been developed subsequently to the 11 September attacks. Another issue  concerns the location of the target of a terrorist attack. International  terrorism often targets private citizens outside their own territories, such as  private tourists. It is not clear if such attacks qualify as an attack on the  private individual’s state of nationality for the purposes of Art. 51. A  self-defense operation against international terrorism may also complicate the  application of the principle of proportionality because it can be hard to  determine when the state has put an effective halt to the attack.  
Question  7: 
  How  could one argue for the legality of humanitarian intervention in the absence of  an authorization from the UN Security Council?
Guidance:
  The question asks the students to consider the  contentious issue of the legality under international law of a right to  humanitarian intervention without a mandate from the Security Council and to  try to argue for the existence of such a right. The book is skeptical and holds  that it is hard to see how humanitarian interventions can be lawful without  authorization from the Security Council. But it also refers to some of the  arguments that have been put forward to support the existence of such a right.  The students are asked to consider such arguments and try to expand on them.
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