Boroughs in Pennsylvania are governed by a "mayor-council" system in which the mayor has only a few powers (usually that of overseeing the municipal police department, if the borough has one), while the borough council has very broad appointment and oversight. The council president, who is elected by the majority party every two years, is equivalent to the leader of a council in the United Kingdom; his or her powers operate within boundaries set by the state constitution and the borough's charter. A small minority of the boroughs have dropped the mayor-council system in favor of the council-manager system, in which the council appoints a borough manager to oversee the day-to-day operations of the borough. As in the case of townships, a number of boroughs have adopted home rule charters; one example is State College, which retains the mayor-council system that it had as a borough.