China Oilfield Services Limited announced that its wholly owned subsidiary COSL Drilling Europe AS ("CDE") has recently been granted the certificate of Acknowledgement of Compliance ("AOC") by Norway Petroleum Safety Authority ("PSA") for its accommodation rig COSL Rival. AOC is a prerequisite qualification for the operation in Norwegian waters and only companies and platforms qualified are eligible to operate in Norwegian waters.

The AOC Qualification issued by PSA is a set of comprehensive and rigorous assessment result on both software and hardware facilities such as corporate structure, management system, equipment condition of COSL Rival, etc. COSL Rival is a semi-submersible accommodation rig that provides living support to up to 358 crew members.