One parliamentarian has at least seven family members on the National Assembly’s payroll.
The remaining part of the draft is expected to be finalized next month.
Heng Pov was once an adviser to Prime Minister Hun Sen.
The move is criticized by a human rights group.
Cambodian press reports had said loans would resume in December.
Their newspaper publishers say they were investigating illegal logging.
Groups say the Don Sahong project will block migratory fish routes, putting the nutrition and livelihood of millions at risk.
The negotiations under a new framework resume next week.
The arrest comes as three men are formally charged with the weekend murder of a reporter who probed illegal logging.
The attack follows the smuggling-linked murder of a journalist at the weekend.
The victim was believed to have investigated the illegal timber trade.
But it’s not immediately clear when parliament will start discussing the proposed legislation.
In return, the government will face a U.S. $10 million revenue loss.
The complaint alleges crimes against humanity on the civilian population.
On World Habitat Day, they converge on parliament and the prime minister’s home.
Civil society groups criticize National Assembly chief for barring public and media from commission meetings.
Many experience anemia and low body weight from not eating enough.
Prime Minister Hun Sen will leave the decision to build the project to the next generation.