The President of the Democratic Republic of Congo, Félix Tshisekedi, will succeed Cyril Ramaphosa, South Africa's head of state, who, in the same session, received the presidency of the organization for Egypt in the same session in one year.
The session, which started around 11:30 am local time, marked the official start of two days of work, which will take place behind closed doors and end at the end of Monday with a public ceremony.
Before the official start of the summit, the heads of state and government posed for the usual group photo.
Among the Portuguese-speaking African countries, Angola and Cape Verde are represented by the respective presidents of the Republic, João Lourenço and Jorge Carlos Fonseca, and the delegation of Mozambique is headed by the Prime Minister, Carlos Agostinho do Rosário.
The São Tomé and Príncipe delegation is led by the Minister of Foreign Affairs, Elsa Pinto, while Guinea-Bissau will be represented by Suzy Barbosa, who resigned as Minister of Foreign Affairs, but is in Addis Ababa with "full powers" of representation attributed by President José Mário Vaz.
According to the agenda, during the summit, representatives of the 55 AU countries will review the progress of the organization's reforms, reporting on institutional reforms and the African Free Trade Zone.
The report by the Peace and Security Council, which met on Saturday to analyze situations in Libya and the Sahel, will also be under discussion.