If they are VERY professional, they will have their processes in writing as verification that it is enforced equally and fairly by their entire staff. 6.

(Obviously tough to enforce, especially if they have pets, etc) But I guess you could show that their actions are causing yo u damages and take them to court. 

If not, it may be tough to enforce a bill back. 

Even if you do require it, you have to track and enforce it.

From a code enforcement perspective if the kitchen and/or other essential portions of the property are truly uninhabitable then the property is condemnable by the authority having jurisdiction. 

You save face and enforce your lease and show your not a pushover and that the rules are the rules.You confront them and things turn sour and they end up moving because they are mad.

Tell your brother that the locks will be changed on that 30th day to enforce this timeline, and that if he has not yet removed his belongings from the house, they will be placed in bags and set out front for the garbage man to collect.  

Ive also called my town's and county's office and asked around several times but nobody knows what Im talking about.Links Ive found:Fair housing: (even called the phone number on the site)https://www.co.mchenry.il.us/county-government/dep...Landlord-tenant act (this has barely any info)http://www.ilga.gov/legislation/ilcs/ilcs3.asp?

If not the house is not habitable and what I do is call code enforcement to get someone out in 24 hours.

In fact, this is called Selective Enforcement.