Shipping lines are not in a position to be patting themselves on the back just yet over IMO 2020 compliance, despite a fairly smooth ride so far.Lawyers are warning that it is still early days.According to Pauline Kumlehn of Shepstone & Wylie Attorneys, several charter disputes have been recorded in recent weeks around the insertion of bunker adjustment factors and the interpretation of these via arbitration.She said there had been several rows surrounding the actual sulphur content and how these fuels were tested, while difficulties in sourcing compliant fuel – including marine gas oil (MGO) – and deciding how and when a fuel oil non availability report should be used, had been experienced around the world.“There are also some issues arising over suspected instability of new 0.5% sulphur blends.”All ships of 400GT or above, and all platforms and drilling rigs engaged in voyages to port and waters where the MARPOL convention applies, are required to conform,” she said.