According to Pollution Prevention Regulations (33 CFR), when may a person serve as the person-in-charge of both a vessel and a facility during oil transfer operations?

Correct Answer: Option A — When authorized by the Captain of the Port.

Under 33 CFR 156.115, dual-service as Person-in-Charge for both the vessel and facility is strictly prohibited unless explicitly authorized in writing by the local Captain of the Port (COTP), preventing conflicts of interest and ensuring undivided safety oversight during critical transfer operations.