Bersih, a group promoting free and fair elections, says it has found "major irregularities'' in the electoral roll, including more than 2.1 million people without addresses.
"It’s never had an open opposition, it’s never been a multi-party country; that’s not a system that Cambodians are accustomed to. Not that some Cambodians wouldn’t want to have one, but they have not had one," David Chandler says.
On April 30, the National Election Committee announced it was opening registration for parties who wished to contest the July 29 vote.
Rice wine is typically home-brewed and is popular at social gatherings; added alcohol that is not distilled properly contains methanol, which can kill even in small amounts.
Newspaper is widely considered the last independent media voice in Cambodia.
A recent decree stated that the new control measures were intended to protect public health and promote better export-quality goods.
The new deployment comes after two attacks on Cambodian peacekeepers in the past twelve months by guerrilla forces and militiamen in the host countries.
Cambodia is placed 142nd out of 180 countries in this year’s World Press Freedom Index.
The May Day march on Tuesday was limited to a riverside space near the city’s landmark site of Wat Phnom and with a large security force presence.
Bun Chhay was arrested in August last year over a 2007 drugs case and another drugs bust in 2012 and charged with drug trafficking offenses.