See “magic pipes” on cruise ships: more or less diverting oil contaminated water by the engine away from the tanks where they’re supposed to be kept and back into the sea because emptying these tanks when docked costs a bit or money that the cruise ship operator would rather keep for themselves. These are illegal and strict records are supposed to be kept so they can be audited and detected. Yet these records are falsified and useless.
Then make it illegal for any ship built by that company to dock on american shores until every ship they've ever built can be audited for not having this fuckery. At their expense. There needs to be consequences for people breaking the law.