Michigan Compiled Laws, Chapter 123. Local Government § 123.1016

Sec. 16. In the preparation of a charter of a consolidated city, any power, limitation or provision granted to any of the cities or villages affected by the consolidation in any charter previously adopted by such city or village or granted or passed by the legislature for the government of such city or village and contained in the charter of the city or village at the time of the vote to consolidate may be included in the charter of the consolidated city, and when so included, such power, limitation, or the effect of any such provision shall continue with the same force and effect as when adopted by the city or village or granted or passed by the legislature in the first instance.