New directive regarding sulphur regulation is great for the environment but disastrous from a competitive point of view

The new sulphur directive has now come into force. This is great, seen from a environmental point of view, but it is disastrous for the competition amongst shipping companies. 
 
Caring for the environment is important, however, when the directive does not affect all of Europe or the rest of the world, it loses some of its appeaI. I find it even more wrong when certain scrupulous shipping companies, in all likelihood, will disregard the new directive but still charge their customers an increased price as if they have made the nessecary changes to their ships, as stated by the directive. In other words, there will not be a level playing field. 

As already mentioned in earlier posts, the reason for this is that no one will be in charge of controlling that the shipping companies abide by the new directive. No one has explained the possible punishments for not abiding by the directive to me nor who will be in charge of controlling the ships. There will, of course, be cheating until a regulatory authority has been established.

The new directive means that every ship sailing in Northern Europe now will have to reduce their emission of sulphur content in flue gas from previously legal 1.0 to 0.1. Due to this, all shipping companies sailing in the Baltic Sea and the North Sea (Scandinavia) as well as the English Channel must make large investments in their ships. 

Other ships from shipping companies based outside of the affected zone are still to follow the old directive, but change to a cleaner and more eco-friendly fuel in a different tank when entering the areas in question.

My question is as before: Who will be in charge of ensuring that everyone abide by the directive?