Perović were accused of pursuing economic practices incompatible with socialism and forced to resign. Their replacements were obedient but mediocre politicians. Namely, 1971 constitutional amendments transferred significant powers away from the federation to the republics, and the new constitution adopted in 1974 preserved the 1971 reforms nearly completely. It even expanded republican economic powers by putting into law the reformist demands in the sectors of banking, commerce, and foreign currency. The purges of early 1970s drove many reformist communists and the social-democratic-minded away from politics in the final decades of Yugoslavia. Decline and dissolution After Tito's death in 1980 the party adopted a collective leadership model, with the party presidency rotating annually. The party's influence declined and the party moved to a federal structure giving more power to party branches in Yugoslavia's constituent republics. Party membership continued to grow reaching two million in the mid-1980s but membership was considered less prestigious than in the past. Slobodan Milošević became President of the League of Communists of Serbia in 1987 and combined certain Serbian nationalist ideologies with opposition to liberal reforms. The growing rift among the branches of the Communist Party and their respective republics came to a head at the SKJ's 14th Congress, held in January 1990. The SKJ renounced its monopoly of power and agreed to allow opposition parties to take part in elections. However, rifts between Serbian and Slovenian Communists led the SKJ to dissolve into different parties for each republic. The Communist associations in each republic soon adopted the "socialist" or "social-democratic" monikers, transforming into movements which were left-oriented, but no longer strictly communist. the League of Communists of Slovenia (ZKS) became the Party of Democratic Reforms of Slovenia in February 1990 (which merged in 1993 with several smaller parties to form the United List of Social Democrats, which in 2005 adopted their present-day form of Social Democrats) the League of Communists of Serbia (SKS) became the Socialist Party of Serbia (SPS) in July 1990 the League of Communists of Croatia (SKH) became the Party of Democratic Changes (SDP) in November 1990 (which later merged with the much smaller Social Democrats of Croatia in 1994 and was renamed Social Democratic Party) the League of Communists of Macedonia (SKM) became the Social Democratic Union of Macedonia (SDSM) in April 1991 the League of Communists of Montenegro (SKCG) became the Democratic Party of Socialists of Montenegro (DPS) in June 1991