the time, Orbán worked hard to unite the center-right liberal conservative parties in Hungary. At the EPP's Congress in Estoril in October 2002, he was elected vice-president, an office he held until 2012. First premiership (1998–2002) In 1998, Orbán formed a coalition with the Hungarian Democratic Forum (MDF) and the Independent Smallholders' Party (FKGP). The coalition won the 1998 parliamentary elections with 42% of the national vote. Orbán became the second youngest prime minister of Hungary at the age of 35 (after András Hegedüs) and the first post-Cold War head of government in both eastern and central Europe who had not previously been a member of a communist party during the Soviet-era. The new government immediately launched a radical reform of state administration, reorganizing ministries and creating a superministry for the economy. In addition, the boards of the social security funds and centralized social security payments were dismissed. Following the German model, Orbán strengthened the prime minister's office and named a new minister to oversee the work of his Cabinet. In February the government decided that plenary sessions of the Hungarian Parliament would be held only every third week. Opposition parties strongly opposed the change, arguing that it would reduce parliament's legislative efficiency and ability to supervise the government. In March, the government also tried to replace the National Assembly rule that requires a two-thirds majority vote with one of a simple majority, but the Constitutional Court ruled this unconstitutional. The year saw only minor changes in top government officials. Two of Orbán's state secretaries in the prime minister's office had to resign in May, due to their implication in a bribery scandal involving the American military manufacturer Lockheed Martin Corporation. Before bids on a major jet-fighter contract, the two secretaries, along with 32 other deputies of Orbán's party, had sent a letter to two US senators to lobby for the appointment of a Budapest-based Lockheed manager to be the US ambassador to Hungary. On 31 August, the head of the Tax Office also resigned after protracted criticism by the opposition on his earlier, allegedly suspicious, business dealings. The government was also involved in a lengthy dispute with Budapest City Council the national government's decision in late 1998 to cancel two major urban projects: the construction of a new national theatre and of the fourth subway line. Relations between the Fidesz-led coalition government and the opposition worsened in the National