1986 Queen Beatrix subsequently appointed incumbent Prime Minister as Formateur and tasked him with forming a new cabinet. On 14 July 1986 the cabinet formation was completed and the Second Lubbers cabinet was installed with Ruud Lubbers beginning a second term as Prime Minister and Rudolf de Korte as the new Deputy Prime Minister. On 21 July 1986 shortly after the cabinet formation Joop den Uyl who had been the Leader of the Labour Party since 13 September 1966 announced his retirement from front line politics and stood down on 21 July 1986 after serving 19 years as Leader of the Labour Party, he was succeeded by former Trade union leader Wim Kok who had only been a Member of the House of Representatives since 3 June 1986. Term Changes On 23 October 1986 State Secretary for Housing, Spatial Planning and the Environment Gerrit Brokx (CDA) resigned after Parliamentary leader of the Christian Democratic Appeal in the House of Representatives Bert de Vries lost his confidence in his ability to remain in office after a critical parliamentary inquiry. On 27 October 1986 State Secretary for Economic Affairs for international trade Enneüs Heerma (CDA) was appointed as his successor. On 30 October 1986 Member of the House of Representatives Yvonne van Rooy (CDA) was nominated to succeed him as State Secretary for Economic Affairs for international trade. On 3 February 1987 Minister of the Interior Kees van Dijk (CDA) took a medical leave of absence after he had to undergo surgery as a result of heart problems. During his sick leave Minister of Social Affairs and Employment Jan de Koning (CDA) served as acting Minister of the Interior while State Secretary for Social Affairs and Employment Louw de Graaf (CDA) was temporarily appointed as Minister of Social Affairs and Employment. On 6 May 1987 Kees van Dijk returned from his sick leave and resumed his duties as Minister of the Interior. On 6 September 1988 Minister of Defence Wim van Eekelen (VVD) resigned after the conclusions of a critical parliamentary inquiry into fraud was released about the time he had served as State Secretary for Foreign Affairs in the previous cabinet. On 9 September 1988 State Secretary for Foreign Affairs René van der Linden (CDA) also resigned. Minister for Development Cooperation Piet Bukman (CDA) served as acting Minister of Defence until 24 September 1988 when Member of the House of Representatives