The Pollution Prevention Regulations (33 CFR) require that no person may transfer oil to or from a vessel unless __________.

Correct Answer: Option B — flange couplings are properly bolted

33 CFR 156.120 mandates that all flange couplings must be properly bolted to ensure a secure, leak-free connection during oil transfer operations. Proper bolting prevents catastrophic failure of the transfer hose connection, which is a primary cause of accidental oil spills during bunkering or cargo operations.