Enrique Pena Nieto, who was declared as Mexico's president-elect, is moving to form a transitional team, calling for unity amid opposition supporters protest.

"It is time to look forward and to start to build and work together," Nieto said in a broadcast speech after accepting Friday a certificate from the nation's Supreme Electoral Tribunal awarding him victory.

"Within days I will publish the names of my transition team. I want to make sure the transition will be orderly and transparent," said the president-elect from Mexico's Institutional Revolution Party (PRI).

Mexico's Supreme Electoral Tribunal on Friday formally declared Nieto, who won 20 percent more votes than the second place candidate, as the nation's president-elect. He is set to rule the country from December 2012 to November 2018.

Right ahead of Nieto's speech, the tribunal's president Jose Alejandro Luna Ramos said that the tribunal had done sterling work defending the nation's democracy.

"Voters expressed themselves freely in this election," Ramos said. "At every stage of the process, the principles of objectivity and certainty were preserved."

He said that tribunal workers had handled more than 2,000 complaints about the process since last October, when the election campaign formally began.

"The time for normal state activity has come. It is time for moderation and sense to rule," he added.

Earlier on Friday, the tribunal formally threw out opposition demands to nullify the nation's July general election.

The tribunal also released the full counts of the July 1 election, showing that Nieto won 19.1 million presidential votes, compared with 15.8 million by the Progressive Movement's candidate Andres Manuel Lopez Obrador, and 12.7 million by the National Action Party's (PAN's) candidate.

The court had released a statement saying "the judges...consider that the arguments presented by the Progressive Movement coalition seeking the nullification of the election were in general vague, imprecise and generic."

Opposition supporters gathered around the court to protest the decision, while the government sent troops and set up barriers to protect officials.

Ramos made a public statement on Thursday, attempting to head off any possible arguments over the decision.

Obrador's coalition, made up of the Revolutionary Democratic Party and the Workers Party and Citizens' Movement, had called for the cancellation of the election on constitutional grounds. But the judges ruled that "the tribunal can only declare a nullification for the causes expressed in the law, which were not established for July 1's elections."

The court's seven judges unanimously ruled against the following allegations made by the coalition, which claimed that Nieto's PRI had made illegal use of voter surveys and broadcast media as election propaganda and bought votes directly using supermarket cash cards.

Judge Salvador Nava Gomar said that the 10,000 pieces of evidence delivered were imprecise, and that "Mexico has a president chosen by the people and that is Enrique Pena Nieto."

Judge Flavio Galvan Rivera said there could still be sanctions, including fines, for some bad behavior during the elections, which would be dealt with by the authorities responsible. Nieto will now take office on December 1, leading a legislature that is also dominated by the PRI.

At a broadcast press conference, Obrador said that he opposed the tribunal's ruling, claiming that the elections were "neither clean, nor free, nor authentic.

"His movement will meet at the weekend and decide how to campaign against the government once it sits, but he has already made a public call for civil disobedience.

Obrador was second place candidate in the 2006's presidential elections won by PAN's Felipe Calderon. Obrador also made public allegations of fraud following the publication of the 2006 election result.

"I think Lopez Obrador is a spent force," said Eric Farnsworth, analyst at the Council of the Americas." The Mexican people have spoken and he's been rejected twice, so I don't think many people will heed his call for disobedience at this point."

The PRI held power since Mexico's revolution in 1929 until 2000, when it handed power to the right-wing PAN.