One of the most common subjects of local and regional referendums is that of changes to the boundaries of local and regional authorities, even where the final decision is a matter for national law, as stated, for instance, in the replies from Albania, Croatia, Estonia, Hungary, the Netherlands and Russia; in Austria, municipal boundary changes can be the subject of a referendum in some Länder. In Switzerland, the federal constitution provides for the approval of the electorate concerned in respect of any change to a canton’s geographical boundaries. In Italy, regional boundary changes and the establishment of new regions are submitted to mandatory referendum. In Portugal, local referendum (the only one which exists for the time being) may at best deal with territorial changes of a municipality only in the framework of proceedings for consultation of local bodies, proceedings which the legislature has to follow. By contrast, referendums cannot be held on geographical boundary changes in Belgium.