The Tribunal Secretary, Mr Ibrahim Sada told the News Agency of Nigeria (NAN) on Tuesday in Ibadan that the petitions were filed within the 21-day period allowed by law.
Sada said of the 20 petitions, six were on senatorial election and 14 emanating from the conduct of the House of Representatives polls.
The tribunal secretary explained that two petitions on the senatorial election were filed by the Peoples Democratic Party (PDP), three by New Nigeria People’s Party (NNPP) and one by Accord party.
He said that with regards to the house of representatives election, four petitions were filed by APC, PDP 6, NNPP 3, and Accord party, one.
Sada said that the 21 days grace allowed by law for aggrieved parties and candidates to file their petitions from the day of announcements of results had lapsed.