Synopsis As Introduced Amends the Counties Code and the Illinois Municipal Code. Provides that, by no later than April 1, 2011, a county with a population over 500,000 or a municipality with a population over 100,000 must acquire and maintain a gunshot location system to assist law enforcement agencies. Sets forth the requirements for the gunshot location system. Defines "gunshot location system". Limits home rule powers. Effective January 1, 2011.