Cambodia also urged the international community not to interfere in its internal affairs and respect its sovereignty.
The CPP won all 125 seats in the National Assembly in July after it oversaw the banning of the country’s main opposition party, the Cambodia National Rescue Party.
The NEC said that it would also remove those who had been reported deceased in the same period and an additional 100,000 names.
The Supreme Council of Consultations (SCC), as the forum will be known, will provide a check on the power of the ruling Cambodian People’s Party, according to Hun Sen.
Kem Sokha was not present at the hearing, which lasted for nearly one hour.
Opposition Cambodia National Rescue Party was dissolved by court last year for alleged complicity in treason plot.
Results ensure Prime Minister Hun Sen's tightfisted three-decade grip on power.
Restrictions apply to those 'responsible for the most notable anti-democratic actions taken in the run-up to the flawed July 29 election'.
Prime Minister Hun Sen, who has ruled Cambodia for over 33 years, remains defiant.
The comments followed previous statements from the Trump administration on the election, which saw the ruling Cambodian People’s Party win all 125 seats in parliament
At the annual Overseas Khmer Summit (OKS), rights activists and academics in the Cambodian diaspora denounced the election and appealed to the international community to intervene.
The ruling Cambodian People’s Party won a landslide victory, claiming more than three-quarters of the votes cast and all 125 seats in parliament.