To undertake urgentl y the convening of a constitutional coníerence, in which there shall be full participation of representatives of all political parties, for the purpose of formulating a constitution for Southern Rhodesia, in place of the Constitution of 6 December 1961, which would ensure the rights oí the majority oí the people, on the basis oí "one man, one vote", in conformity with the principies oí the Charter of the United Nations and the Declaration on the granting of independence to colonial countries and peoples, embodied in General Assembly resolution 1514 (XV);