(1)    The board of public works shall continue as constituted, or it shall be composed of such city officers as the council shall designate, or the council may act as a board of public works, or the board may be dispensed with and the functions thereof exercised by the council, as may be provided by ordinance.

   (2)   Any other board or commission, except the board of police and fire commissioners, may be dispensed with or the number of members thereof be changed by a vote of the people held in the manner provided by s. 9.20, and in case of discontinuance the powers and duties of any such board or commission, shall be exercised and performed by the council. Unless the board of public works shall be dispensed with or changed by ordinance, or other boards or commissions shall be dispensed with by such vote of the people, they shall continue to have and perform the same powers and functions that they possessed and exercised at the time when the city adopted the commission form of government, and shall continue to be elected or appointed as then provided by law, except that members then appointed by the mayor shall be elected by a majority vote of the council like other city officers under s. 64.30.

   (3)   Any city work done under the direction of commissions appointed by the state shall continue to be done in the manner prescribed by law immediately prior to the adoption by the city of the commission form of government.

   (4)   All boards and commissions in any 2nd class city under the commission form of government shall continue to be elected or appointed as provided by law at the time when the city adopted the commission form and shall continue to have and exercise all the authority they then possessed. Any board or commission, except the board of police and fire commissioners, may be dispensed with or changed in membership by a vote of the people held in the manner provided by s. 9.20.