Muhammadu Buhari, on Wednesday, swore-in Ibrahim Tanko Mohammed, as the Chief Justice of Nigeria (CJN).
He became the 18th CJN at the brief ceremony.
Mohammed, who took over after Buhari unconstitutionally suspended Walter Onnoghen in January.
His screening at the Senate last week sparked outrage as he could not answer what technicality in law is.
At the swearing-in ceremony were the Vice President Yemi Osinbajo, Speaker of the House, Femi Gbajabiamila, Deputy Senate President, Ovie Omo-Agege.
Also at the ceremony that started around 10.30am, included Inspector General of Police, Mohammed Adamu, Borno State Governor, Babagana Zulum, Bauchi State Governor, Bala Mohammed.
Others included the Secretary to the Government of the Federation, Boss Mustapha, Chief of Staff, Abba Kyari, and Head of Service, Winifred Oyo-Ita.
