A vessel has arrived in a U.S. port from a foreign voyage. Preliminary entry has been made. Formal entry at the U.S. Custom House must be made within how many hours after arrival (Sundays and holidays excepted)?

Correct Answer: Option C — 48

Formal entry at the U.S. Custom House must be completed within 48 hours of arrival from a foreign port, excluding Sundays and holidays. This regulatory requirement, found in 19 CFR 4.3, ensures that the vessel and its cargo are properly documented and cleared for legal operation within U.S. waters.