Four forms of city government determine the administrative role of any city council. Most Oregon cities with populations over 2,500 have the council/manager or council/administrator form, in which the council hires a chief executive officer to be responsible for the daily supervision of city affairs. Portland has a commission form of government, where the elected commissioners function collectively as the city council and serve as administrators of city departments. Smaller Oregon cities typically have the mayor/council form, in which the legislative and policy-making body is a popularly elected council.An elective city officer shall be a qualified elector under the state constitution and shall have resided in the city during the 12 months immediately before being elected or appointed to the office. In this subsection "city" means area inside the city limits at the time of the election or appointment. In addition, a councilor shall have resided in the ward the councilor represents during the 12 months immediately before being elected or appointed to the office.Please see City Charter.