The opposition Cambodia National Rescue Party won 489 out of 1,646 commune chief positions in the June 4 election.
The former opposition president, Sam Rainsy, though not named during the debate around the changes, is thought to be the target of the amendments.
The tribunal explained the dismissal of a case against Im Chaem, a middle-ranking Khmer Rouge district chief charged with crimes against humanity.
Kem Ley was a regular feature of pro-opposition and independent talk radio stations, where he often made comments critical of the government.
UNESCO said area had been identified as Ishanapura, capital of ancient Chenla Empire, Khmer civilization that flourished in late 6th and 7th centuries and preceded Khmer Empire
Eng Chhay Eang says the CNRP will not attend the session because “the intention of the new rules is to narrow the CNRP’s path [to election victory].”
Last week Cambodia closed cross-border routes used by migrant workers to prevent further economic migration to Thailand and curb illicit goods smuggling.
Military government has been forced to set a six month grace period for new migrant labor laws with harsh penalties, after protests and panic among workers and employers.
The population in Cambodia’s capital city is estimated to increase by more than 50 percent, to 7.9 million by 2030.
The letters ordered the groups to halt their activities and said the Situation Room was an unregistered organization and in breach of the law.
The Licadho report went on to detail what it said was the routine shutting down of peaceful protests and inflammatory rhetoric in the run up to local elections last month.