PART IV—ARREST AND SURRENDER OF PERSONS TO ICC
Restrictions on Surrender
51. (2) The Minister may refuse a request by the ICC for
                     the surrender of a person if—
               (b) there are competing requests from the ICC and a
                     State that is not a party to the Rome Statute
                     relating to different conduct and section 60 (3) applies.
Competing request - different conduct - international obligation to extradite
EDIT.