...the latter, via renvoi (see also A. Gourgourinis, ‘Lex Specialis in WTO and Investment Protection Law’, German Year
book of International Law 53 (2010): 591). Accordingly, tribunals did not deal (and needed not deal) with the question of existence state practice and opinio juris regarding MST, but rather sought to answer the question regarding the content of FET (and, by implication, MST). Hence, arbitral tribunals called upon to interpret and apply FET clauses reflecting MST have advanced the position that the content of MST is not static. I do not see...