The territory of a city adopting any of the plans of government provided for in this chapter shall continue to be divided into the same number of wards existing at the time of such adoption, which shall retain their boundaries until changed in accordance with general law.
Mass. Gen. Laws ch. 43, § 6
Wards, number and boundaries to continue until changed under law
Official source: Massachusetts Legislature. Reproduced from public-domain Massachusetts statutes; confirm against the official source for the current text. Not legal advice.