PART I—PRELIMINARY
International Crimes
8. A person who is alleged to have committed an offence under section 6 may be tried and punished in Kenya for that offence if—
(b) at the time the offence is alleged to have been committed—
(i) the person was a Kenyan citizen or was employed by the Government of Kenya in a civilian or military capacity;
Unique provision - jurisdiction
Nationality jurisdiction - national proceedings
EDIT.