I read a few introductory texts on decentralization and found very few references to cultural minorities with regard to Cambodia.
In an essay titled ‘Decentralization and Civil Society in Cambodia: a brave new state?’ I found very few references to my issue, among them the following one: “It should also be noted that the rights of minorities under the 1996 Cambodian nationality law are not explicit: Constitutional protection is extended only to ‘Khmer’ people, but it is not clear how this is to be defined in a multi-ethnic society. This point will be very relevant in gauging the democratic content of the decentralization exercise.”
In a Literature Review on Decentralization (2001) by CCSP I found few but helpful insights. About ethnic or religious minorities who live territorially concentrated the author notes “Such minorities often live in close proximity to and among majority groups, and when that is true, decentralization may actually empower arenas in which prejudices against minorities are stronger than at higher levels in the political system. It may suggest Manor (1997), make things worse.”