General Charter Law Provisions.
Milwaukee City Charter § 20-15
in effect20-15. General Charter Law Provisions.
In any case, whether occurring heretofore or hereafter, where the common council of any city incorporated by special act shall have undertaken and assumed to adopt in whole or in part the provisions of the general city charter law of this state, and such city and its officers shall have assumed thereafter in good faith to act under, and to exercise the powers conferred by, the provisions of law so assumed to be adopted, any question of the validity of such assumed adoption and of the ordinance and proceedings therefor may be tested by certiorari or by any other proper action or proceedings brought directly for the purpose of vacating or setting aside the same at any time within three months after such assumed adoption, but not thereafter. No such assumed adoption nor any ordinance or proceeding for such adoption of the whole or any part of such general city charter law shall be in any manner called in question or held to be invalid in any action or proceeding except one brought directly for that purpose within the time hereinbefore limited therefor, unless the same shall have been duly vacated or set aside by a court of competent jurisdiction. (S. 926a Stats. 1911.)
Source: City of Milwaukee Legislative Reference Bureau, Milwaukee City Charter and Code of Ordinances (city.milwaukee.gov master PDFs)URL: https://city.milwaukee.gov/ImageLibrary/Groups/ccClerk/Ordinances/City-Charter/CH20.pdf#page=8Fetched: 10/26/2026