The Ministry of Interior recently completed another draft of the law after it rejected the first version under international criticism.
Civil society leaders have said they would need at least a month to properly review the law.
The first version was sent back to them from the Council of Minsters, following widespread criticism from the international community.
Pung Chhiv Kek, founder of the rights group Licadho, said Cambodia was now sliding backwards in its adherence to human rights norms.
The government will hold a workshop on Dec. 19, but organizations said that it will not be enough time to review the draft for problems.
The NGO law was kicked back to the Ministry of Interior earlier this year after heavy public criticism.
The two cases have fueled concern among court observers they are being stymied by government interference, a charge that officials deny.
At least two women threatened suicide over the loss of their homes.
Drugs such as crystal meth and ecstasy are now among the top three drugs of use in the 15 east and southeast Asian countries.
Cambodia’s press freedoms were ranked 128th out of 178 countries in 2010, a slide from 117th the year before.
The rights group says the Cambodian government is ignoring its international obligations by pushing ahead with forced evictions.
Subedi spoke to VOA Khmer after he was a guest speaker for a conference on the Paris Peace Accords in Berkeley, California.