Lawrence v. Regent Realty Group, Inc. et. al. (197 Ill. 2d 1, 9-10 (2001)) is the grand poo bah of Chicago Residential Landlord Tenant Ordinance lawsuits. Sure, there were others that came before it, but Lawrence opened the floodgates to a generation of attorneys who have great success in making landlords pay for simple little violations of the CRLTO.