Legal Question in Landlord & Tenant Law in Illinois

What does the lease say about the landlord's obligations? Normally leases say little to nothing, but if they do they say the landlord will take some kind of reasonable/normal/etc. care of the "common areas" and if the parking lot is shared by the tenants, it's a common area. And unless there are specifics ("clear snow after each 2" snowfall...") then the rule is what is reasonable.... Check with the building department, however, because there may be a local ordinance requiring clearing of private property or where the private property abuts public walks, etc., and if so there may be a code violation involved.