This study of KPCS [Kimberley Process Certification System]-related internal diamond controls...describes "best practices" in several countries [Angola, Canada, Belgium, Democratic Republic of Congo, United Kingdom, United States, also European Union]. It reveals serious weaknesses as well, which - if they are not corrected - will compromise the effectiveness of the overall Kimberley Process Diamond Certification System. [refers to De Beers, SODIAM (part of Endiama), ASCorp (Angola Selling Corporation) (joint venture Endiama, Lev Leviev Group, Omega Diamonds)]