WI/Milw; How to modify the terms of a M-M agreement?

[Kelly G.]

Greetings;

I cannot find any legal language or guidance on changing the rental terms for a M-M rental agreement in WI (milw).  My Nolo Landlord's law book says there is no state statute , but some doc I downloaded from the Wi Dept of Agr, Trade, & Consumer Protection says I must give 28 day notice to increase the rent.  

I'm not increasing the rent (per se) but want to change the payment of utilities to tenant (I was paying partial sewer); which would effectively increase their rent.  I don't mind giving 28 day notice.  Just want to be sure I'm not missing something.  

I also need to clarify/modify/add some 'rental rules and regulations' - regarding maintenance of the property - mostly

I am assuming I will need to send the tenants a new/revised rental agreement for them to sign.  I used to have a PM so never had to deal with this; now I'm on my own.

Any advice is appreciated

Kelly 

SFH - Milw