The measures are designed to crack down on the sales of pirated U.S. products overseas.
A UN spokesman told VOA Khmer this week the government has an obligation to fill vacant posts at the court.
The letter was delivered to China, France, Russia, the UK and the United States.
Phan Imex was supposed to build 10 buildings to house evicted residents and built eight instead.
The UN appointed a reserve judge to the position, Laurent Kasper-Ansermet, but that appointment has not been confirmed.
Norodom Sihanouk, who is 90, has suffered from cancer, diabetes and hypertension and has made frequently, prolonged trips to China.
A US official said this week that Obama could participate in an Asean summit to be hosted in Cambodia in November.
Witnesses said security guards for the TTY Company opened fire with AK-47s.
Escapees climbed over the walls or jumped the metal gates of the Prey Speu Social Affairs Center Wednesday in full view of observers.
Cambodian police in Kampong Speu province discovered five bodies thought to be those of Frenchman and his four children. Police are investigating how they were ended up in a car dumped in a pond behind the family home.
This comes a day after defense attorneys say they want to summon the head of a leading genocide research organization before the court.
In her letter to the court, shared with reporters, she said she had paid the fine in full, from reductions in her parliamentary salary.