Armed attacks on political representatives; Preah Serei Areyak Meteyor Party; Repatriation; Political party; Voter registration; Registration sites; Sergio Vieirra de Mello, UNTAC Director for Repatriation; Cheng Eav Meng, President, Preah Serei Areyak Meteyor Party; Chak Saroen, President, Action for Democracy and Development Party; Kim Kethavy, President, Republic Democracy Khmer Party; Long Bora, President, Cambodia Free Independent Democracy Party; Sing Cham, Khmer Neutral Democratic Party