CHAPTER V: ENFORCEMENT OF PENALTIES OF THE COURT
SECTION I: SENTENCING DECISIONS
Art. 55 Execution of the sentence of imprisonment
1 Upon acceptance of the request by the Central Authority, the sentence of imprisonment imposed by the Court shall become executable in Switzerland. The sentence shall be binding; only the Court shall have the right to decide on any reduction of the term of imprisonment.
Non-modification of sentence by State
Revision of conviction or sentence - ICC proceedings
EDIT.