In 2009, Parliament approved the creation of two additional provinces: Hela Province, consisting of part of the existing Southern Highlands Province, and Jiwaka Province, formed by dividing Western Highlands Province. Jiwaka and Hela officially became separate provinces on 17 May 2012. The declaration of Hela and Jiwaka is a result of the largest liquefied natural gas project in the country that is situated in both provinces. The government set 23 November 2019 as the voting date for a non-binding independence referendum in the Bougainville autonomous region. In December 2019, the autonomous region voted overwhelmingly for independence, with 97.7% voting in favor of obtaining full independence and around 1.7% voting in favor of greater autonomy.