Claiming the poll would not be fair, Odinga boycotted the second vote and Kenyatta won with 98 percent.
The Interior Ministry wasted no time issuing a statement after the ceremony declaring the NRM an "organized criminal group" under Kenya's Prevention of Organized Crimes Act.
The police have vowed to block opposition supporters from reaching the event.
There are fears that the government may have revoked the licenses of the popular TV stations to punish them for going against its directive.
The Kenya government shut down four popular TV channels and several radio stations ahead of the planned swearing-in of opposition leader Raila Odinga as the "People's President" in the capital Nairobi.
Kenya's Supreme Courtdeclared Kenyatta victor of the official October 25 election, which came weeks after the original August 8 vote that was annulled by Kenya's high court.
By 6am GMT, about 400 people were gathered in Uhuru Park, near Nairobi's main business district.
The ODM boss and veteran Opposition leader deems Uhuru's presidency illegitimate.
During a speech lasting less than five minutes, Odinga declined to give details of his plans and said they would be disclosed in "due course".
The ceremony was attended by some of his most loyal supporters, who participated despite threats from the government that it would be considered treason if they were to do so.
Three Kenyan television and radio stations remained off the air on Wednesday and said they had not heard from authorities, a day after they were shut down while airing coverage of an opposition gathering in Nairobi.
NASA is considered the victor of the presidential elections held last August, which were annulled by the Supreme Court.
The result of the August general election was annulled following allegations of irregularities. The electoral commission has refuted those claims.
"Kenya is on a very slippery trajectory in regard to human rights, and president Kenyatta urgently needs to reverse this trend", Namwaya said.
A re-run of the election was held on October 26. At least 92 people were killed past year as election turmoil gripped the country.
During the meeting at Harambee House, the National Security Advisory Committee (NSAC) also chose to withdraw Mr Odinga's official police bodyguards. "We need change and that change must come today", she said.
In some cases, journalists and bloggers critical of the government and senior officials have been physically attacked or killed, by people who have been identified.
The White House's Immigration Plan
No matter that evidence shows that legal and undocumented immigrants are less likely than native-born Americans to commit crime. And any measure capable of garnering support from nine Senate Democrats - even moderates - faces an uphill battle in the House.
GOP senators urge Trump to stay in NAFTA
Smith wants the NAFTA negotiations to progress in such a way that they help bring certainty to Nebraska farmers. Despite pressure from GOP lawmakers and business leaders, he's kept up the criticism since taking office.
Justin Timberlake Super Bowl bash outrages some Prince fans
Dozens more fans gathered at the airport to see the team board the Patriots' plane, known as Air Kraft after team owner Bob Kraft. Louis Rams' practice before Super Bowl XXXVI, but Belichick denied those accusations and were not penalized.
Facebook to show more local news in News Feed
Who will end up counting as a "trusted" news source? Mosseri said Facebook will "continue to value publisher content". After all, the more the users spend time on the social site, the more advertising revenue it would translate to.
Huddersfield 0-3 Liverpool: Reds stars rated and slated
Speaking to BT Sport after a routine outing at the John Smith's Stadium, Klopp was content to praise Can's efforts on the field . Alas, here we are after a defeat in South Wales and an FA Cup exit and the mood has already changed.
Putin jokes he's 'offended' not to be on US 'Kremlin list'
Bosnich said that " this list does not refer to anyone who has violated any kind of financial rules or any kind of laws ". They feared that even if it did not impose further sanctions , it would have a chilling effect on their businesses.
Marvel's Black Panther gets a new poster and TV spot
I have to say from my years of covering all the Marvel Studios news, this is unlike Kevin Feige to skip out on interviews. The movie took over Twitter , as critics were enthusiastic about sharing their opinions about Ryan Coogler's work.