The senator representing Delta Central at the National Assembly, Ovie Omo-Agege, resumed plenary on Wednesday.
It was the first time he attended plenary after a Federal High Court in Abuja declared his suspension by the Senate for 90 legislative days unconstitutional.
There was expectation that he would resume on Tuesday but he refused to show up.
On Wednesday when he resumed, he signed the attendance register as it is the tradition and left the chamber.
He later joined his colleagues who later went into a closed door session.
Omo-Agege was suspended on April 2, 2018 for 90 legislative days following his opposition to Senate’s amendment of the sequence of the 2019 general election.
As arranged by the Independent National Electoral Commission, INEC, the presidential election was to come first.
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But in its amendment, the Senate put the presidential election last and Omo-Agege as well as some other senators believed that it was targeted at President Muhammadu Buhari.
His offence was also going to court to challenge his suspension after he had already apologised.
Ruling on his case on May 10, Justice Nnamdi Dimgba said Omo-Agege’s suspension was unconstitutional.
He said despite the fact that he could be penalised, the basis for his suspension was wrong.
The Senate has however gone to the appellate court for a stay of execution of the Federal High Court’s verdict.
But pending the outcome of the case filed by the Senate, it announced on Monday that Omo-Agege was free to resume office on Tuesday and would not be prohibited in any way from carrying out his duties.
The Senate said the decision was in compliance with the judgement of the Federal High Court, Abuja, which described the suspension of Omo-Agege unconstitutional.
The Senate however said its future action would be determined by the verdict of the appellate court on the motion for stay of execution of the Federal High Court’s verdict.
The position of the Senate was made known on Monday in a statement issued by the Chairman, Senate Committee on Media and Publicity, Senator Sabi Aliyu Abdullahi.