A vessel arrives in San Francisco from a foreign voyage. When MUST the Master make formal entry at the custom house?

Correct Answer: Option D — Within 48 hours after arrival, Sundays and holidays excepted

Per 19 CFR 4.3, the Master of a vessel arriving from a foreign port must make formal entry at the custom house within 48 hours, excluding Sundays and holidays. This process involves submitting the manifest and other required documents to ensure the vessel is legally cleared for cargo operations.