How can the Illinois Constitution be amended?

The Illinois Constitution allows for amendments to be made either through a referendum or by action from the state legislature. This dual method ensures that both the direct will of the people and the formal legislative process can play a role in how the Constitution evolves.

When an amendment is proposed by the state legislature, it must be approved by a three-fifths majority in both houses. Alternatively, citizens can initiate a referendum, allowing voters to decide directly on proposed amendments. This approach reflects democratic principles by giving power to the electorate and ensuring that significant changes to the state's governing document have broad support.

The other options do not align with the established process for amending the Illinois Constitution. A gubernatorial decree is insufficient for constitutional amendments, as such changes require broader legislative or public consent. Approval from the U.S. Congress is also not needed for state constitutional amendments, as state governance and constitutional provisions are determined within the state itself. Lastly, the Supreme Court's role is not to create or amend the Constitution but to interpret it, meaning that they do not have the authority to amend it by a majority vote.