(a)
the act of state or government must be a political decision of national sovereignty;
(b)
it must not have been taken in favour and the personal interest of the state (') or of its own enterprise; and
(c)
it must be such that its effects would have been the same regarding private enterprises.18
18See K.H. Böckstiegel, 'The Legal Rules Applicable in International Commercial Arbitration Involving States or State-Controlled Entities'. in 60 Years of ICC Arbitration 117 (Paris 1984); K H Böckstiegel, Arbitration and State Enterprises (Kluwer 1984), at 37-48.