in a judicial opinion citing Canada's history of using a residence-based electoral district system and a justification based on social contract theory, which held that the five-year limit was a permissible limitation of the constitutional right to vote under Section One. As of August 2015, Elections Canada has implemented changes to its registration process to comply with the latest court ruling, and will require expatriates already on the register to declare an intended date of return. The decision from the Court of Appeal was subsequently appealed to the Supreme Court of Canada, which announced on April 14, 2016 that it would hear the appeal. On January 11, 2019 the Supreme Court reversed the Court of Appeal's decision and ruled that non-resident citizens have the right to vote regardless of time living outside of Canada. Length of election campaigns The length of election campaigns can vary, but under the Elections Act, the minimum length of a campaign is 36 days and the maximum length of the campaign is 50 days. Also section 5 of the Charter requires that the Parliament sit at least once every twelve months, and thus a campaign would have to conclude in time for returns to be completed and parliament to be called into session within twelve months of the previous sitting. The federal election date must be set on a Monday (or Tuesday if the Monday is a statutory holiday). The first two elections, the 1867 election and the 1872 election, took place over several weeks. The 1872 election was both the second shortest and the longest campaign in history. Parliament was dissolved on July 8, 1872, while the writ was dropped on July 15, 1872. Voting occurred from July 20 to October 12. Therefore, the campaign started 12 days after dissolution of Parliament and 5 days after the writ, and was concluded 96 days (13 weeks plus 5 days) after dissolution and 89 days after the writ. Every subsequent election has occurred on a single day. Of these elections, the longest election campaign, in terms of days from dissolution to election day, was that of 1926 election, following the King-Byng Affair, which lasted 74 days. In terms of days from writ to election day, the longest campaign had been the 1980 election, which lasted 66 days. It was surpassed by the 2015 election, which was 78 days long from writ to election day, making it