Supporters gathered outside Prey Sar prison on Wednesday, holding a Buddhist celebration to pray for the detainees’ release.
The draft law, which was leaked to the public recently, imposes major fines and jail time for vague offenses and has many online users concerned.
Rong Chhun, head of the Cambodian Confederation of Unions, is making a trip through the US, seeking support to help free 21 labor activists who have been in jail since deadly crackdowns on demonstrations in January.
Rong Chhun told VOA Khmer Tuesday the US is a major market for garments produced in Cambodia and a major donor to Cambodia.
Seven families in at the site, in Boeung Kak 1 commune, Tuol Kork district, are embroiled in a land dispute with the Khun Sear Import & Export Company.
More than half a million people have been affected by land disputes over the last 14 years, according to a report by the rights group Licadho.
Two decades have passed since hundreds of thousands of people were killed in the Rwanda genocide, and Western powers were accused of standing by and allowing it to happen.
In 17 years, Cambodian authorities have failed to find a single suspect in a grenade attack on an opposition rally that killed 16 people and wounded more than 100 others.
The ministry has refused to grant Beehive permission to expand its radio network or to add a television station to its operations.
Two were subsequently released, but the other 21 have remained in jail, despite public and international condemnation.
The Court of Appeals on Monday denied the release of 21 labor activists who have been detained since brutal demonstration crackdowns in January.
Critics say the 21 are being held without bail as a tactic to intimidate other would-be protesters.