Under a T/C with maximum duration to mid-December 2019, Charterers redelivered late, in February 2020, with 165 MT HSFO (by then out-lawed by the IMO fuel regulations in force 1.1.20). Owners claimed in respect of post-redelivery time and cost of a trip to de-bunker, relying on cl. 10, which set out a sliding scale of permitted redelivery HSFO quantities to be endeavoured. The Tribunal dismissed Owners’ claims based on cl.10 (due to its non-mandatory nature) and on an implied term requiring zero ‘un-burnable’ ROB after 31.12.19 (as the situation was contemplated by neither party). However, ruling that rate differential was not the only measure of late-redelivery damages, the Tribunal held that cl.10 meant that de-bunkering was within the contemplation of the parties and resulting expenditure recoverable by Owners.