It is very clear that section 308(1)(a) of the 1999 Constitution confers on the President, Vice-President, Governor or Deputy Governor, absolute immunity against the institution of civil or criminal proceedings or the continuation of such civil or criminal proceedings against the President or Vice-President, Governor or Deputy Governor, as long as they remain in office as such. It follows therefore that where an action or proceeding had been instituted prior to the person assuming the relevant office, such action or proceeding cannot be continued against the occupant of the relevant office during his tenure in the said office-see Tinubu v. I.M.B. Securities Plc (2001) 16 NWLR (Pt. 740) 670 at 708.
– Onnoghen, J.S.C. GEC v. DUKE (2007)