Mich. Comp. Laws § 117.14
Whenever an incorporated village is incorporated as a city, without change of boundaries, such city shall succeed to the ownership of all the property of such village and shall assume all of its debts and liabilities. Whenever a city, village or township is annexed to a city, the city to which it is annexed shall succeed to the ownership of all the property of the city, village or township annexed, and shall assume all of its debts and liabilities. Whenever a part of a city, village or township is annexed to a city, the real property in the territory annexed which belongs to the city, village or township from which it is taken shall be sold by the authorities of the city, village or township in which said land was located before such annexation, and that portion of the proceeds of such sale shall be paid to the city acquiring such territory which shall be in the same ratio to the whole amount received as the assessed valuation of the taxable property in the territory annexed bears to the assessed valuation of the taxable property in the entire city, village or township from which said territory is taken. Whenever a part of a city, village or township is annexed to a city, all of the personal property belonging to any such city, village or township from which territory is detached shall be divided between the township, city or village from which said territory is detached and the city to which the territory is annexed, in the same ratio as the assessed valuation of the taxable property in the territory annexed bears to the assessed valuation of the taxable property in the entire city, village or township from which said territory is taken. Whenever a new city shall be incorporated, the personal property of the township from which it is taken shall be divided and its liabilities assumed between such city and the portion of the township remaining after such incorporation, which incorporation shall be effective as of the date of filing the certified copy of the charter as hereinafter provided, in the same ratio as herein provided in case of the annexation of a part of a township to a city, and any real property of a township located in such new city shall be held jointly by such city and the remaining portion of the township in the ratio above mentioned. Such real estate shall be subject to sale by agreement of the governmental units or may be partitioned in the manner provided by law for partitioning of lands held by persons as tenants in common: Provided, That no cemetery within such territory shall be sold; but to the extent it is owned by the city, village or township within which it is located, it shall become the property of the city to which it is annexed.
Whenever a new city is incorporated from part of a township or townships, such city shall be entitled to its pro rata share of the amount thereafter due such township or townships or due any county agency in respect of population in such township or townships from any future distribution of gasoline and motor vehicle weight tax revenues, intangibles tax revenues, state alcoholic liquor tax revenues, or any other state funds, moneys or grants which, by law, now or hereafter, are required to be distributed among cities, villages, townships and/or counties of the state, which pro rata distribution shall be determined as follows, to-wit:
The township or townships from which such incorporated city is incorporated or the county agency receiving the funds, moneys or grants in respect of population in such township or townships shall be liable to the incorporated city for its proper pro rata share of any state funds, moneys or grants received by such township or townships or such county agency, respectively, after the date of incorporation;
Whenever a part of a city, village or township is annexed to a city, the city to which such territory is annexed shall be entitled to its proper pro rata share of any of the said state funds, moneys or grants thereafter distributable under the law to the city, village or township from which said territory was detached or to any county agency receiving state funds, moneys or grants in respect to population in such township or townships, determined as follows:
The foregoing provisions shall be used hereafter in determining the pro rata distributions of any state funds, moneys or grants between townships or county agencies and any city which has become newly incorporated or annexed territory since the latest decennial federal census, either before or after the passing of this law; but in no event shall the sharing of any distribution of state funds, moneys or grants made previous to the effective date of this act be altered.
The indebtedness and liabilities of every city, village and township, a part of which shall be annexed to a city shall be assumed by the city to which the same is annexed in the same proportion which the assessed valuation of the taxable property in the territory annexed bears to the assessed valuation of the taxable property in the entire city, village or township from which such territory is taken. Assessed valuation shall be determined in every division pursuant to this section from the last assessment roll of the city, village or township which has been confirmed by the board of review.
MCL 117.14