They are the codes you operate your business by.Also you should be aware that when starting out if you are uncertain how to deal with tenants and are uncertain as to how to implement practices due to personal emotional conflicts you would be advised to hire a property manager. 

My policy when governments pass such legislation is "business as usual".

@Mindy Jensen I am not a fan of legislating common sense.

http://www.ilga.gov/legislation/ilcs/ilcs5.asp?

there is a movement in MO to unite all landlords - right now the new group MO REIA or MO Landlords (not formally named yet) has a group on Facebook and on Meetup, just to collect all interested parties together.The hope is to change MO legislation for the better.Right now the person who is the move and shaker on this initiative is Steve Vogel and he is filling committee positions to get the group started and functioning.

The Good Landlord's uses is Zane Froerer who's an eviction attorney (and probably has some pull with Gage Froerer, a veteran state legislator).

Ok, I know this relates to an entirely different country  but the USA also has legislation governing unfair terms in consumer contracts and they probably entail similar legal doctrines.Basically the proposition is this.

@Jeff Rabinowitz yes there can be challenges in any large metropolitan area that have pro tenant legislation in place.  

It OFTEN happens, more times than you would think and as much as 50% of the time.The requirements for a righteous sale have been legislated much more difficult over the years.There are 3 notice requirements and if ANY of the 3 is deficient, it could be enough to set aside the tax sale. 

I'm not up to date on the Dodd-Frank legislation on seller financing requirements or when it was enacted.