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.
In her letter to the court, shared with reporters, she said she had paid the fine in full, from reductions in her parliamentary salary.
Asean countries are facing a multitude of issues which includes a dispute over the South China Sea.
The Documentation Center has provided around 500,000 documents to the tribunal since its inception.
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