INTERNATIONAL CRIMINAL COURT
Four stage process to change the law
Any state which has ratified (officially agreed to) the Rome Statute of the International Criminal Court (ICC) may propose an amendment. There are currently 123 of these States Parties.
This requires a majority of those present and voting at the next annual assembly of the ICC to agree that the amendment can be considered. One state, one vote.
This requires at least a 2/3 majority of States Parties (currently 82/123) to be in favour of the amendment. It is likely to take place at a special Crime Review Conference, where the final text of the amendment will be discussed and agreed amongst States Parties.
States Parties can then ratify (officially submit their agreement) and the law will enter into force for those States Parties one year after their ratification.