The Central Committee (CC) is the CPV's most powerful institution. It delegates some of its powers to the Secretariat and the Politburo when it is not in session. When the Vietnam War ended in 1975, the Vietnamese leadership, led by Lê Duẩn, began to centralise power. This policy continued until the 6th National Congress, when Nguyễn Văn Linh took power. Linh pursued a policy of economic and political decentralisation. The party and state bureaucracy opposed Linh's reform initiatives; because of this, Linh tried to win the support of provincial leaders. This caused the powers of the provincial chapters of the CPV to increase in the 1990s. The CPV lost its power to appoint or dismiss provincial-level officials in the 1990s; this is proven by the fact that Võ Văn Kiệt tried to wrestle this power back to the centre during the 1990s without success. These developments led to the provincialisation of the Central Committee; for example, more and more CC members have a background in provincial party work. Because of these changes, power in Vietnam has become increasingly devolved. The number of Central Committee members with a provincial background increased from a low of 15.6 percent in 1982 to a high of 41 percent in 2000. The former President of the Socialist Republic of Vietnam Trương Tấn Sang (2001–2016) was directly elected from the provinces at the 8th Party Congress, held in 1996. Because of the devolution of power, the powers of the Central Committee have increased substantially; for instance, when a two-thirds majority of the Politburo voted in favour of retaining Lê Khả Phiêu as General Secretary (the leader of Vietnam), the Central Committee voted against the Politburo's motion and voted unanimously in favour of removing Lê Khả Phiêu from his post of General Secretary. The Central Committee did this because the majority of its members were of provincial background, or were working in the provinces; because of this, these members were the first to feel the pinch when the economy began to stagnate during Lê Khả Phiêu's rule.