المختار ولد داداه
The Mauritanian Progressive Union headed by Moktar Ould Daddah won 33 of the 34 seats in the Territorial Assembly elections held in March 1957. Moktar Ould Daddah was chosen as the Chairman Mauritian Advisory Council by France's fourth republic. On 28 November 1958, a Constitutional amendment allowed the creation of a transitional Legislative Council, replacing the Territorial Assembly. The country lacked experts to frame the constitution and accepted the proposals of a group of French jurists on 22 March 1959 unanimously.