002/19-09-2007-ECCC-OCIJ ЮŲŠ / No: D427 870” or the “Organization’s Office” without clarity about which particular office was being referred to. 52. Political Office 870 was principally tasked with ensuring the flow of communication between the decision-makers in the CPK Centre, and for monitoring the implementation of decisions through a system of regular reporting directly to Political Office 870.148 According to the minutes of the 9 October 1975 meeting of the Standing Committee, referring to the office headed by Doeun, it is stated the “Office of the Standing Committee makes contacts back and forth with each section. The Standing Committee monitors each section’s implementation of the line. The Office has the task of monitoring implementation”.149 53. The functions of Office S-71, as described by Duch, were the “protection of the central office and cadre, welcoming guests, communications, logistics, food, transport”.150 Office S-71 was however also tasked on behalf of the Standing Committee to monitor suspected members of the CPK, the Ministries, the Central Committee and the Standing Committee itself, and to effect arrests of those perceived to be traitors and their transfer to S-21.151 54. Contained within the structure of S-71 was a series of sub-offices, code-named with the prefix “K”, that performed a variety of administrative or logistical functions to support the work of the Centre. These K offices reported directly to Pang.152 Those of particular significance included K-1, K-3, K-7 and K-18. 55. The evidence shows that K-1 was a housing compound containing both the residence and working place of Pol Pot,153 though some witnesses state that K-1 was only the working place of Pol Pot.154 Furthermore, a number of witnesses state that Nuon Chea and Khieu Samphan would also reside and/or work at times with Pol Pot at K-1.155 56. There is further evidence that the location known as K-3 was a residence and working place of Nuon Chea and/or Khieu Samphan and/or Ieng Sary and/or Son Sen and/or Vorn Vet at various times.156 Nonetheless, a number of witnesses attest to seeing Pol Pot arrive to conduct meetings at either K-1 or K-3 with Nuon Chea, Ieng Sary, Son Sen, Vorn Vet and Khieu Samphan,157 as well as with Ieng Thirith on occasion if the meeting concerned Social Action.158 57. K-7 was a messenger unit through which written communications addressed to “Committee 870” or “Office 870” were routed before being directed to Pol Pot at K-1 as well as to the members of Committee 870 or its appropriate member depending on thematic Extraordinary Chambers in the Courts of Cambodia, National Road 4, Choam Chao, Dangkao Phnom Penh Mailing address: P.O. Box 71, Phnom Penh; Tel: +855(0)23 218914 Fax: +855(0) 23 218941. 21