FOR Ariffi Nawawi, President Director of Indonesia's state oil & gas company Pertamina, the fasting month this year appears to be harder than usual. The current extremely tough negotiations with ExxonMobil Oil Indonesia regarding the extension of the management contract at the Cepu oil field in Central Java have really sapped his energy. At the beginning, Pertamina was targeting to have the agreement wrapped up this month. But after a mara