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.
Electoral system of Australia
Compulsory voting has also been promoted for its collective benefits. It becomes difficult for coercion to be used to prevent disadvantaged people (the old, illiterate or disabled) to vote, and for obstacles to be put in the way of classes of individuals (ethnic/coloured; either registration requirements or placement of voting booths) as often happens under other voting systems. The compulsion requirement also needs to be kept in proportion: jury duty and compulsory military service are vastly more onerous citizen's compulsions than attending a local voting booth once every few years. Perhaps the most compelling reason to use a system of compulsory voting is a simple matter of logistics, that is, to facilitate the smooth and orderly process of an election. Every year in countries that do not have compulsory voting election officials have to guess at the numbers of voters who might turn out – this often depends on the vagaries of the weather. Often voters are disenfranchised in those countries when voting officials err and not enough voting booths are provided. Long queues can result with voters being turned away at the close of polling not having had their chance to exercise their democratic right to vote.