According to U.S. regulations, no person may transfer oil to or from a vessel unless each person in charge has signed what document?

Correct Answer: Option C — declaration of inspection

Per 33 CFR 156.150, the Declaration of Inspection (DOI) is a mandatory legal document verifying that all safety requirements for oil transfer are met. Both the vessel and facility Persons-in-Charge (PIC) must sign this document before any transfer begins to ensure compliance with federal pollution prevention regulations.