entire district. The party has a youth wing, Left Youth Solid, and a student wing known as The Left.SDS. The party is also affiliated with a number of left-wing think tanks, education, and policy groups, most prominently the Rosa Luxemburg Foundation. The party is formally led by a 26-member Party Executive Committee (PEC), of which seven are members of the party's leadership, the executive board. This includes two federal co-chairpersons, of which at least one is required by statute to be female. Convention also dictates that one leader should come from the Eastern states and one from the west, though this is not an official rule. The PEC is elected by a regular party congress, which also discusses and determines the party platform and rules on basic political and organisational matters. The leadership group of the party's Bundestag faction is considered a second centre of power within the party, and conflicts sometimes arise between the federal leadership and parliamentary group. This most prominently happened in 2015, which resulted in Bundestag co-leaders Sahra Wagenknecht and Dietmar Bartsch being elected as lead candidates for the 2017 federal election, defeating federal co-chairs Katja Kipping and Bernd Riexinger. The Left's internal structure underwent a transitional phase after its formation in 2007 in order to integrate the different groups. Western party organisations were initially strongly favoured in party congresses, which strengthened the "fundamental opposition" faction of Oskar Lafontaine. These provisions expired at the 2014 party congress. The dual leadership, initially a temporary measure, was adopted permanently in 2010. This was not initially the case for the parliamentary group leadership, which was co-chaired by both Gregor Gysi and Lafontaine between 2005 and 2009, and solely by Gysi thereafter. After his retirement in 2015, however, the dual chairmanship was reintroduced. The executive committee originally comprised 44 members, but was reduced to 26 at the 2022 party congress. The number of deputy leaders was originally four, increased to six in 2018, and reduced to three in 2022. The Left is noted for having an unusually strong and formalised system of internal factions, which are outlined in the party statutes. Factions with sufficiently large membership are entitled to send delegates to party congresses. In addition, there are around 40 working groups within the party. Since June 2022, the composition of the Party Executive Committee has been as follows: The Council of Elders (Ältestenrat) is an advisory body formed in