What is required for a convention to be called regarding the Illinois Constitution?

A convention to be called regarding the Illinois Constitution is indeed associated with a review process that is mandated to occur every 20 years. This requirement is set forth in the Illinois Constitution, which stipulates that the electorate must decide whether to hold a constitutional convention after a period of two decades. This process allows voters the opportunity to consider amendments or alterations to the state's governing document, ensuring that it remains relevant and reflective of the needs and values of Illinois residents over time.

While the other options present valid legislative concepts, they do not align with the established practice for calling a convention in Illinois. A simple majority of voters or a legislative majority does not suffice for this specific constitutional action without adherence to the stipulated timeline. Additionally, a governor's vote is not a requirement for initiating such a convention. Thus, the every 20 years review process is not only correct but essential to maintaining the democratic practice of constitutional governance in Illinois.