Jubilee Party National Elections Board chairman Andrew Musangi while announcing Mariga’s candidacy described him as a man of impeccable character and credentials who has had "enduring connections with the people of Kibra".
After he was handed the certificate, Mariga found himself at crossroads after IEBC declined to clear him on grounds that his name was not in the voter register.
IEBC returning officer Beatrice Muli then told Mariga to seek redress with the IEBC Disputes Resolution Board.
"We have invalidated Mariga's nomination," she said.
Muli said other documents presented to them were in order.
"Mine was to confirm that the aspirant meets requirements. I have verified and checked and I could not find his details. At this point my hands are tied," she added.
Mariga filed a petition with the Dispute Resolutions Board which in its determination cleared him.
Making the ruling on Monday, IEBC Dispute Tribunal said it is obligated to conduct continuous registration of citizens as voters.
"It is our finding that the complainant was duly registered as a voter," IEBC Chairman Wafula Chebukati said.
Chebukati said that the absence of his name in the voter register cannot be taken as conclusive proof of lack of registration.
