Michigan property law uses March 31, 1997 as the reference date to determine how many times a parcel has been subdivided. The property's configuration on that specific date becomes the legal baseline for deciding future division rights, since tracking prior subdivisions requires a fixed point in time.
For most properties in Michigan, that reference date is March 31st, 1997. The parcel configuration on that particular date is used to determine the available division rights. Why that date matters. This date is important because the law needed a way to establish a baseline. Without a reference point, it would've been difficult to determine how many times land had already been divided. So the law effectively asks a question: What did the property look like on March 31st, 1997?
