PART III – MAKING AND EXECUTION OF LEGAL ASSISTANCE REQUESTS
11. Grounds for refusal
(c) the request relates to the prosecution of a person for an offence in a case where the person has been acquitted or pardoned by a competent tribunal or authority in a requesting state, or has undergone the punishment provided by the law of that country, in respect of that offence or of another offence constituted by the same act or omission as that offence ;
Admissibility challenge
Ne bis in idem
Ne bis in idem - ICC
Admissibility challenge - ne bis in idem
Pardon
EDIT.