The current constitution was ratified by popular referendum during the military junta of 1980-1983. Since its ratification in 1982, the current constitution has overseen many important events and changes in the Republic of Turkey, and it has been modified many times to keep up with global and regional geopolitical conjunctures. Major amendments were made in 2010. A minor amendment to Article 59, on the permissible means for challenging "decisions of sport federations relating to administration and discipline of sportive activities," was made in March 2011. Following the 2017 constitutional referendum, fundamental changes were introduced including changing the parliamentary system in Turkey to a presidential system.