![Australia's 116-year-old Constitution has not had a change in 40 years.](/web/20170101160248im_/http://www.smh.com.au/content/dam/images/g/k/i/a/o/9/image.related.landscape.460x307.gtjf7l.png/1483262002402.jpg)
Our nation's rulebook is showing its age
This year marks the 40th anniversary of when Australians last voted to change the Constitution. That was on May 21,1977, when the people voted Yes to three proposals, including setting a retirement age of 70 for federal judges. This remains the most successful referendum day in the nation's history.