Electoral system
Electoral rules place limits on suffrage and candidacy. Most countries's electorates are characterised by universal suffrage, but there are differences on the age at which people are allowed to vote, with the youngest being 16 and the oldest 21 (although voters must be 25 to vote in Senate elections in Italy). People may be disenfranchised for a range of reasons, such as being a serving prisoner, being declared bankrupt, having committed certain crimes or being a serving member of the armed forces. Similar limits are placed on candidacy (also known as passive suffrage), and in many cases the age limit for candidates is higher than the voting age. A total of 21 countries have compulsory voting, although in some there is an upper age limit on enforcement of the law. Many countries also have the none of the above option on their ballot papers.
Universal suffrage
Citizens of an EU Member State are allowed to vote in EU parliamentary elections, as well as some local elections. For example, a British person living in Graz, Austria, would be entitled to vote for the European Parliament as a resident of the "electoral district" of Austria, and to vote in Graz municipal elections. He would, however, not be entitled to vote in Austrian (federal) elections, or Styrian (state) elections. Similarly, all locally resident EU citizens in the UK are allowed to vote for representatives of the local council, and those resident in Scotland, Wales and Northern Ireland may vote for the devolved parliaments or assemblies. But, only British, Irish and Commonwealth citizens are allowed to vote for the British House of Commons. However, not all British citizens are allowed to vote, since non-resident British citizens lose their franchise after 15 years. In fact the British government is planning to reinstate universal suffrage soon.