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.
Private member's bill
Among the most notable of the successful bills was the "Commonwealth Electoral Bill 1924", which introduced compulsory voting for federal elections. This was introduced by Senator for Tasmania Herbert Payne of the Nationalist Party on 16 July 1924, passed by the Senate on 23 July, passed by the House of Representatives on 24 July - both times with little debate - and given Royal Assent on 31 July. Despite much public debate ever since on the issue of compulsory voting, the legislation has never been repealed.