MARPOL Annex IV deals with shipboard sewage. How do current international regulations affect everyday processing and treatment systems?

Option C: Regulations are not yet universally enforced by every minor state, but many countries have adopted strict, stringent domestic rules for territorial waters

While international sewage regulations (Annex IV) have become stricter, global enforcement remains dependent on national adoption and port state requirements. Many jurisdictions impose additional stringent regulations within their territorial waters for sewage treatment and discharge.