Customs entry control for vessels and aircraft requires landing only at designated ports or airports, with limited emergency exceptions. The person-in-charge of a vessel or aircraft entering India from outside India must not, on first arrival or while carrying imported passengers or cargo, call or land at any place other than a customs port or customs airport, unless permitted by the Board. If compelled by accident, stress of weather, or another unavoidable cause to land elsewhere, immediate reporting, production of the log book, restriction on unloading or departure, and compliance with directions are required, subject to exceptions for health, safety, or preservation of life or property.