The law of treaties
Question 1:
  In what ways does the interpretation of constituent treaties and human  rights treaties differ from a more traditional approach to interpretation? 
  
Guidance:
  The question seeks to engage with  the student’s ability to apply the principles of treaty interpretation to  different treaties. The book notes that the general principles of treaty  interpretation are found in the articles 31–33 of the  VCLT. According to art. 31, a treaty is interpreted with regard to the ordinary  meaning of its terms in their context and in the light of its object and  purpose. However, the book also notes that the precise weight that must be  given to these elements may differ from treaty to treaty. Treaties that create an  international organization or institution – constituent treaties – are  generally interpreted in a manner that ensures the effective functioning of the  organization. Human rights treaties differ from many other treaties because  they seek to establish standards of behavior of a general nature. They are  therefore usually interpreted in a manner that emphasizes the object and  purpose of the treaty, see also Question 4 to Chapter 9.
Question 2:
  What is the meaning of pacta sunt servanda and how does the  principle manifest itself in the law of treaties? 
Guidance:
  The question asks the student to examine  the fundamental nature of the pact sunt  servanda principle. The most important principle of the law of treaties is  that of pacta sunt servanda whereby a treaty-based obligation is binding  and must be performed by the parties in good faith. The principle is found in  Art. 26 of the VCLT but is reflected in many of the other articles in the VCLT.  Art. 27 holds, for example, that national law is no excuse for not performing a  treaty-based obligation. The principle is also reflected in the rules on  invalidity of treaties contained in Art. 46-53 and 64 of the VCLT. These rules  illustrate that as a main rule treaties entered into must be honored.
Question 3: 
  How should one determine if an agreement  is a treaty governed by international law or is merely a political pledge?
Guidance:
  The  question encourages the student to engage with the distinction between legally  binding treaties and instruments that are not legally binding. It is therefore  related to Questions 6 and 7 in Chapter 2 on legal sources and the concept of  so-called “soft” law. The book notes that it is only when a political pledge to  behave in a certain manner is accompanied with an intention to create a legally  binding obligation that an agreement constitutes a treaty for the purposes of  international law. The determining factor is the intention of the parties. Did  they mean to create a legal obligation when they signed the instrument? Or did  they only seek to create a political commitment? To assist, the lawyers may  rely upon both the terminology and the form of the instrument as well as the  overall circumstances that surrounds the conclusion of the instrument. The book  also notes that it may be of relevance to examine how the parties dealt with  the instrument after it was concluded, as that can give an indication of what  the parties intended. Art. 102 stipulates that treaties must be registered with  the UN Secretariat and registration, or a lack thereof may also be an  indication. The book notes that jurisprudence from the ICJ indicates that the  Court does not believe that it requires a lot for an agreement to fulfill the  conditions for being a treaty under international law.
Question 4:
  It is often the case that a treaty does not enter into force until after  a certain amount of time has passed. While a consenting state cannot be bound  by a treaty that has yet to enter into force it is not entirely free to act as  it pleases. Why is that? From where is such an ‘obligation’ derived? 
Guidance:
  The  question concerns the so-called interim period that is referred to as the time  that passes from the moment a state consents to be bound by a treaty and the  moment the treaty enters into force. The book notes that Art. 18(b) of the VCLT  stipulates that consenting states must refrain from acts which would ‘defeat  the object and purpose’ of the treaty during the interim period. The  determination of whether a concrete act qualifies is made on a case-by-case  basis but the book states that it will probably only be acts that seem to be  motivated by bad intentions that are prohibited. Since the treaty has not yet  entered into force, the basis for the obligations in the interim period cannot  be the pacta sunt servanda principle.  Instead, the obligations are deemed to derive from a more general obligation of  good faith.
Question 5:
  Can you provide some examples of when it  is important to identify the object and purpose of a treaty? 
Guidance:
  The question asks the student to  engage with the principles of treaty interpretation and identify some examples  of where the object and purpose of a treaty is of importance. Question 1  touched upon the interpretation of human rights treaties where it is generally  the case that the interpreter relies extensively upon a teleological  interpretation of the treaty and thus the treaty’s object and purpose. In  general, as noted in the guidance to Question 1, the object and purpose of a  treaty is of particular importance in treaties that have a “law-making”  character.
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