Border Treaty with Vietnam Poses Dilemma for new King
So to sign the treaty would draw his father's [Norodom Sihanouk] disapproval; but to not sign it would earn the enmity of [prime minister] Hun Sen, who has made it patently clear that he feels that an uncooperative monarchy is an expendable institution.
One political observer has likened Sihamoni's predicament "to a Cambodian adage about a person having to choose between getting in a river infested with crocodiles and climbing up onto the shore roamed by tigers". Link