When discharging clean ballast prior to entering a loading port, what must you do if it is determined the ballast exceeds 15 parts per million of oil?

Correct Answer: Option D — the deballasting must be terminated automatically

MARPOL and USCG pollution prevention standards require oil discharge monitoring and control systems to automatically terminate deballasting operations if the oil content exceeds 15 parts per million, ensuring strict compliance with environmental protection regulations.