How did the shipping industry accept / manage / afford to switch fuels (presumably, to more expensive ones) in order to follow the regulation ; as opposed to delay / deny / deflect, or plain old lobbying the hell against the changes ?
Are we in a "Montreal protocol" situation, where the alternative was existing and acceptable and in the same price range ?
Or did one actor implement coercion differently ? Was a standard change made, that enabled drop-in replacement ?
(If we were living under Discworld-like physics where narrativium existed, I would understand _why_ the change happened : it's making climate change worst, so of course there is all the power of narrative irony.
Are we in a world governed by narrative irony ? That would explain so many things...)