The Constitution of the State of Wisconsin was adopted by a Constitutional Convention on February 1, 1848. It was ratified by vote of the People on March 13, 1848. It became effective on May 29, 1848, when Wisconsin was admitted to the United States. The Constitution establishes the structure and function of state government. It also declares the rights of the citizens. The current Wisconsin Constitution contains a Preamble and fourteen Articles. Article XII provides the process for making changes to the Wisconsin Constitution. Wisconsin does not have petition-based referendums or initiatives.
The two methods of amendment provided under Article XII of the Wisconsin Constitution are:
- By Wisconsin State Legislature, and
- A constitutional convention.