The Secretariat of the Centre is hereby authorized to administer, subject to and in accordance with these Rules, proceedings between a State (or a constituent subdivision or agency of a State) and a national of another State,falling within the following categories:
a)
conciliation and arbitration proceedings for the settlement oflegal disputes arising directly out ofan investment which are not within the jurisdiction ofthe Centre because either the State party to the dispute or the State whose national is a party to the dispute is not a Contracting State;
b)
conciliation and arbitration proceedings for the settle- ment of legal disputes which are not within the jurisdic- tion of the Centre because they do not arise directly out of an investment, provided that either the State party to the dispute or the State whose national is a party to the dispute is a Contracting State;and
c)
fact-finding proceedings.
The administration of proceedings authorized by these Rules is hereinafter referred to as the Additional Facility.