The oldest type of city government is the mayor council kind of government. This city government type apes the state and federal government structure, where there is an elected chief of the executive branch and there exists a council to help the chief with the administration. The heads of the different departments are appointed by the mayor. However, it is the mayor who is the face of the city government. The authority given to the mayor may differ from one city to another. In some cities, the mayor may have the veto powers, with which he will be able to veto laws passed by the council, while in other cities, the mayor will need the approval of the council. Preparing the budget of the city is the task of the mayor. The purview of the city council is the laws governing the local issues.