Replaces everything after the enacting clause. Amends the Illinois Vehicle Code. Provides that the Department of Transportation (rather than the Department of Transportation and the Department of State Police) shall conduct an annual study concerned with the results of emission inspections for diesel powered vehicles registered for a gross weight of more than 16,000 pounds or having a gross vehicle weight rating of more than 16,000 pounds. Provides that each diesel powered vehicle that is registered for a gross weight of more than 16,000 pounds or has a gross vehicle weight rating of more than 16,000 pounds and that is operated by an interstate carrier of property or a private interstate carrier of property is subject to the provisions of a Chapter in the Code that pertains to diesel emission inspections (rather than nonscheduled diesel emission inspections). Makes conforming changes. Repeals a provision creating the Diesel Emissions Testing Fund as a special fund in the State Treasury. Makes conforming changes. Amends the Unified Code of Corrections. Provides that the Department of Juvenile Justice shall by regular (rather than certified) mail and telephone or electronic message notify the parent, guardian, or nearest relative of any person committed to the Department of his or her physical location and any change of location. Amends the State Mandates Act to require implementation without reimbursement by the State. Effective immediately.