The basis of the majority of the 855 international investment arbitrations known to - date was an international investment agreement in which a State offers consent to arbitrate to investors that are unknown to it at the time of concluding the agreement. 81% of international investment agreements incorporate an obligation to negotiate, according to which an investor and the State must negotiate for a certain period of time before an investor may submit its claim to arbitration. According to the author, a State’s consent to arbitrate is not given if the obligation to negotiate is not fulfilled, despite international investment tribunals arriving at different conclusions regarding the nature of such an obligation.
Concerning the interpretation of the obligation to negotiate, international investment arbitral practice can be divided into two phases. In the first phase, the interpretation followed decisions of other international courts and was quite lenient in favour of investors. The obligation to negotiate was not seen as 'jurisdictional' but rather as 'procedural', thus not affecting the tribunal's jurisdiction. According to these tribunals, a stricter interpretation could transform negotiations from a tool that enables a more effective resolution of disputes into instruments for delaying the procedure and making it less cost-effective. In the second phase, which is the leading argumentation today, tribunals put greater emphasis on the concept of consent to arbitrate in light of the principle of State sovereignty, again following certain decisions of other international courts (the ICJ in particular). Consent cannot be deemed to be given by the State if the conditions of such a consent have not been met.
The obligation to negotiate as an obligation of conduct is not absolute since it has exceptions such as futility. However, the burden of proof in such cases is on the investor and the standard of proof is strict. The master thesis also touches upon the MFN clause, which, according to the author, should not affect the obligation to negotiate unless it expressly provides otherwise.
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