There would be by-elections to elect three senators and 16 House of Representatives members as well as three state constituencies.
The Senators to be elected will be in Ebonyi, Yobe and Plateaus states as follows: Ebony-South, Yobe East and Plateau Central.
The 16 House of Representatives seats will come from four federal constituencies in Kebbi, Lagos, Ondo and Taraba as well as three state constituencies in Benue, Borno and Kaduna States.
Also, 4,567,689 Nigerians are expected to vote in the February 3 re-run and by-elections in 27 states.
The break down shows that 2,189,171 will participate in by-elections in two senatorial districts, four federal constituencies and three state constituencies.
Also, 2,220,912 will vote in court-ordered re-run elections into the National Assembly. The remaining 157,606 eligible voters will take part in the elections into state constituencies
The vacancies were created as a result of the resignations of the occupants of the offices and the deaths of the previous lawmakers.
The federal constituencies include Surulere 1 (Lagos), Gauri/Shanta/Ingaski and Arewa/Dandi (Kebbi), Akoko North East/North West (Ondo), Jalingo/Yorro/Zing (Taraba), Ikono/Ini (Akwa Ibom) and Akamkpa/Biase (Cross River State).
Others are Nnewi North/Nnewi South and Orumba North/Orumba South (Anambra), Igbo Eze North/Udenu (Enugu), Birnin Kudu/Buji (Jigawa), Igabi and Kachia/Kagarko (Kaduna),
At the state level, elections will be conducted to fill vacant positions in Adamawa, Akwa Ibom Bauchi Bayelsa Cross River, Delta, Enugu, Kaduna Kano Nasarawa Niger, Oyo, Sokoto, Zamfara, Benue and Borno states.
The list of candidates for the by-elections is expected to be submitted to the Independent National Electoral Commission on January 13. The final list of candidates will be published on January 17.
The campaign is expected to start on January 18 and close on February 1.