How does a city or village change the size of its governing body?
A village board may, by ordinance,
change the number of trustees but the change shall not affect the term
of office of trustees elected before the ordinance authorizing the
change is adopted. Wis. Stat. sec. 61.20(4). The common council of a
city may, by a two-thirds vote of all its members but not more
frequently than once in 2 years, increase or decrease the number of
aldermanic districts or the number of members of the city council.
However, the common council must then redistrict, readjust and change
the boundaries of aldermanic districts to meet certain statutory
requirements. Wis. Stat. sec. 62.08(4).