At a meeting on Thursday at the Heritage Foundation, speakers said the newly one-party parliament did not reflect voters’ wishes to see pluralistic democracy in the country.
The NEC said that it would also remove those who had been reported deceased in the same period and an additional 100,000 names.
William Heidt, the US ambassador, told VOA Khmer that he hoped Cambodia would move towards a more “open” political system in the coming year.
The EU is Cambodia's largest export market, with garment exports to the EU alone amounting to about $700 million annually.
Hun Sen said countries outside of the region were “always slapping our heads” and “getting involved in regional politics,” according to a video posted on his Facebook page.
The EU resolution calls for asset freezes on senior Cambodian officials and action to be taken over Cambodia’s membership of preferential trading schemes.
A series of interviews intended to clear name of embattled tax chief Kong Vibol has raised further questions about his business dealings at home and abroad.
Around 16,000 Chinese tourists visited Cambodia over the past seven months, according to the Tourism Ministry.
The former RFA reporters were held without charge for 48 hours after their arrest, they told the court, which broke the law.
Kem Sokha is now placed under house arrest and is still denied access to his former colleagues at the Cambodia National Rescue Party, which was banned in November.
In May, eight witnesses were called in the case, mostly senior officials from non-governmental groups advocating for better living standards and rights for Cambodians.
Kem Sokha was released into house arrest after spending more than a year behind bars awaiting trial on treason charges.