The City of Ames will be proposing proposing an ordinance to require that Greek housing, apartment complexes over a certain capacity, etc, have sprinkler systems installed. I believe that if this does pass that sororities and fraternities would have around three to five years to retrofit their facilities. Some chapters have already begun fundraising efforts.
Link to Des Moines Register article
Have other campuses had this happen? I believe the University of Illinois came up from time to time, when I was still advising at Iowa State.