(EnergyAsia, June 11 2010, Friday) — The International Maritime Organisation (IMO) has issued new guidelines tightening the sulphur content requirement on ship fuel to 3.5% from 4.5% from 2012. The organisation also decided last year to aim for a sulphur emission content of 0.5% by the beginning of 2020. The Marpol Annex VI restriction on…