All the evidence suggests these adjustments to cleaner shipping have been fairly painless. Was everyone well prepared or were we simply distracted by other, rather more pressing, world matters?
Nevertheless, throughout last year just 55 cases of non-compliance were reported – considering more than 60,000 vessels traversed the world's oceans, this is an exceptionally low number.
But others aren’t satisfied by small reductions in sulphur content - a team in Costa Rica is attempting to turbo charge the move to clean shipping with a cargo ship made of wood.
The Ceiba combines old and new technology: sailing masts vie with state of the art solar panels and a custom designed electric engine. The team hope to get Ceiba on the water by the end of the year and fully operational by 2022.
But Ceiba is a little small for a cargo ship – she can carry the equivalent of nine 20ft containers worth of cargo. Compare this to the HMM Algeciras, the world's largest container ship, which is able to carry 23,964 20ft containers. Our friends in Costa Rica may have a little way to go before they are ready to build a competitor!