Amends the Counties Code. Provides that no home rule county may impose, pursuant to its home rule authority, a personnel mandate that requires a municipality, township, school district, community college district, park district, or other unit of local government to establish, expand, or modify its activities in such a way as to necessitate additional expenditures from local revenues of that unit of local government. Provides that, if a home rule county's personnel mandate conflicts with an ordinance of another unit of local government, the ordinance of the other unit of local government shall control within the jurisdiction of that other unit of local government. Effective immediately.