CMAC is meanwhile in the process of educating civilians in the area of safety around cluster munitions.
Ros Sovannareth was the second Free Trade Union activist of three killed in 2004.
But countries accuse each other of using banned weapons in their battles in past few days near 900-year-old Hindu temple.
The cross-border fight killed at least five people, including one Cambodian and one Thai civilian.
The seminar follows heavy fighting on the border over the weekend, when Cambodian and Thai troops exchanged fire.
The fighting reportedly damaged part of Preah Vihear temple, a Unesco World Heritage site.
Hor Namhong said Monday he had briefed diplomats on the request and would travel to New York to report to the Security Council.
Association of Southeast Asian Nations is trying to negotiate end to clash between two countries' forces.
The Cambodian government says part of an 11th-century Hindu temple has been damaged by cross-border artillery fire from the Thai army.
Government spokesman Phay Siphan said Thai political strategists have used the border situation to unseat two prime ministers.
Friday's fighting included the firing of multiple rockets from vehicle platforms and from tanks.
The Sam Rainsy Party holds 26 of 123 National Assembly seats; the Human Rights Party holds three.