Maintenance AIS System at Malaysia-Thailand JDA Block-17 (CPOC). Carigali-PTTEPI Operating Company Sdn Bhd, CPOC, serves as the Operator under the Joint Operating Agreement between PETRONAS Carigali JDA Ltd and PTTEP International Limited (‘PTTEPI’) in respect of the exploration and exploitation of petroleum for Block B-17 & C-19 and Block B-17-01 located at the lower part of Gulf of Thailand near the South China Sea.