Mich. Comp. Laws § 41.731

Sec. 11. Should any parcel of land be divided after a special assessment thereon has been confirmed, and before the collection thereof, the township board may require the supervisor to apportion the uncollected amounts between the several divisions thereof and the report of such apportionment when confirmed by the township board shall be conclusive upon all parties: Provided, That if the interested parties do not agree in writing to such apportionment, then before such confirmation notice of hearing shall be given to all the interested parties, either by personal service or by publication as above provided in case of an original assessment roll.