Creates the Land Bank Authority Act. Authorizes the corporate authorities of a municipality or county, or 2 or more municipalities or counties, to create a land bank by ordinance (for the corporate authorities of a home rule municipality or county), by entering into an intergovernmental cooperation agreement (for the corporate authorities of 2 or more municipalities and counties), or by authority already provided to a county, municipality, or other taxing district prior to the effective date of the Act. Includes provisions relating to legislative findings and purpose, definitions, and interpretation of the Act. Effective immediately.