PART 4 - ARREST AND SURRENDER OF PERSON TO ICC
Restrictions on surrender
63.
Procedure where competing request from non-State Party—
(3)Despite subsection (2), no person may be surrendered under the Extradition Act 1999 unless and until the ICC makes its decision on admissibility and determines that the case is inadmissible.
Postponement - admissibility challenge
Competing request - same conduct - State not Party - no international obligation - pending admissibility decision
EDIT.