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
Timeline of the Yemeni Revolution (January – 2 June 2011) Yemenis protested in Sana'a's streets since mid-January 2011 to demand a change in government, though the protests in the south of the country were more aggressive. The protests "appeared to be the first large-scale challenge" to Saleh's rule; protesters compared him to the ousted Tunisian President Zine El Abidine Ben Ali, citing government corruption and the poor economy of Yemen. Protests occurred in many towns in both the north and south of Yemen initially against Yemeni governmental proposals to modify Yemen's constitution, rejecting the proposals as insufficient, and over unemployment and economic conditions. Protests on 20 January included thousands of