Hong Kong headquartered Orient Overseas Container Line (OOCL) attains certification on the accuracy and transparency of its environmental data disclosure. OOCL was accredited the certification for 2012 after going through an audit conducted by classification society Det Norske Veritas (DNV), using the internationally recognized and accepted Clean Cargo Working Group (CCWG) verification standard to check for the carbon dioxide and sulphur oxides emissions of OOCL vessels.