Zine El Abidine Ben Ali temporarily the (presidential) duties." However, this arrangement was very short lived, because early the following day (15 January 2011) the Constitutional Court of Tunisia determined that Ben Ali was not "temporarily unable" to exercise his duties and that the presidency was in fact vacant. The arrangements he had made with the Prime Minister before leaving the country were found to be unconstitutional under article 57 of the constitution. The country's constitutional court, the highest legal authority on constitutional matters, announced the transition saying that Fouad Mebazaa (the Speaker of Parliament) had been appointed interim president. Mebazaa took the oath in
Sadok Chaabane and the fast erasure of boundaries. On 1 July 1999 President Zine Al Abidine Ben Ali designated him to supervise his election campaign, which was a very significant experience for him. After the presidential campaign, on 17 November 1999, President Zine Al Abidine Ben Ali appointed him to one of the most important portfolios, Higher Education, under the Premiership of Mohamed Ghannouchi; on 4 September 2002, the department of Scientific Research was added to the Ministry, and the President of the Republic appointed him again to the Democratic Constitutional Rally’s Political Bureau. On 11 November 2004 he left the Government,