The court has completed one trial, of Khmer Rouge torture chief Duch, and is preparing for trial of senior leaders.
Malaysian Defense Minister met with his Cambodian counterpart this week to express his hopes that the border conflict will be resolved.
Wednesday’s agreements were a revamping of deals the countries have had since 1993.
The three men, who deny assaulting the police, say they are afraid the summonses will mean their arrest.
Hun Sen on Friday sharply criticized Voice of America and Radio Free Asia, saying their news reports are "very inferior."
The International Court of Justice ruled in favor of a demilitarized zone and an observer mission earlier this week.
Only three-quarters of those surveyed in 2010 had heard of parliament, but of those, only two-thirds knew what it does.
Members of the CPP have ignored a court summons for testimony from the former international investigative judge.
The International Court of Justice ordered Thai and Cambodian troops to leave a contentious border area on Monday.
China has four hydrodams in operation on the Mekong and has plans for four more. Cambodia and Laos plan to build 12 more more dams.
Cambodian officials say they are prepared to comply with an international court order, but not until third-party monitors arrive.
The court also warned that until it has given a final ruling, it must remain informed of all matters regarding the case.