Port of entry

Key takeaways

Port of entry belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Port of entry to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Port of entry from memory before moving on to harder problems.

Reference excerpt

In general, a port of entry (POE) is a place where one may lawfully enter a country. It typically has border security staff and facilities to check passports and visas and to inspect luggage to assure that contraband is not imported. International airports are usually ports of entry, as are road and rail crossings on a land border. Seaports can be used as ports of entry only if a dedicated customs presence is posted there. The choice of whether to become a port of entry is up to the civil authority controlling the port.

Airport of entry

An airport of entry (AOE) is an airport that provides customs and immigration services for incoming flights. These services allow the airport to serve as an initial port of entry for foreign visitors arriving in a country.

Terminology The word "international" in an airport's name usually means that it is an airport of entry, but many airports of entry do not use it. Airports of entry can range from large urban airports with heavy scheduled passenger service, like John F. Kennedy International Airport, to small rural airports serving general aviation exclusively. Often, smaller airports of entry are located near an existing port of entry such as a bridge or seaport. On the other hand, however, some "former" airports of entry chose to leave their name with the word "international" in it, even though they no longer serve international flights. One example is Osaka International Airport. Even when it had ended all international services and became a purely domestic airport after the opening of Kansai International Airport in 1994, it kept its original name of "Osaka International Airport". Many airports in the nearby region have the same situation, like Taipei Songshan Airport. Songshan retained its official Chinese name, Taipei International Airport, after Chiang Kai-shek International Airport (now Taiwan Taoyuan International Airport) opened. Similar cases of transitions of international airports such as Seoul, Tokyo, Nagoya, Shanghai, Hong Kong, Bangkok, Tehran, etc. For the European Union, flights between countries in the Schengen Area are considered domestic regarding passport and immigration check. Several international airports have only intra-Schengen flights. Several of these have occasional charter flights to foreign countries.

Stateless persons Some cases of statelessness have occurred in airports of entry forcing people to live in the airport for an extended period. One of the most famous cases was that of Mehran Karimi Nasseri, an Iranian national who lived in the Charles de Gaulle Airport in France for approximately eighteen years after being denied entry into France and not having a country of origin to be returned to due to claiming his Iranian nationality had been revoked. Nasseri's experience was loosely adapted by two films, the 1993 film Tombés du ciel and the 2004 film The Terminal. Zahra Kamalfar, an Iranian national who attempted to travel to Canada via Russia and Germany using forged documents, lived in the Sheremetyevo International Airport in Russia for eleven months before being granted refugee status by Canada to reunite with her family in Vancouver.

In the United States The formal definition of a port of entry in the United States is something entirely different. According to the Code of Federal Regulations, "the terms 'port' and 'port of entry' incorporate the geographical area under the jurisdiction of a port director." In other words, a port of entry may encompass an area that includes several border crossings, as well as some air and sea ports. This also means that not every border crossing is a port of entry. There are two reasons for this:

Every port of entry must have a Port Director, which is a higher pay grade than a typical border inspector. The U.S. government has determined that some small border crossings do not need their own Port Directors. As a result, border outposts like Churubusco, Chateaugay and Fort Covington, New York are considered "stations" within the Trout River Port of Entry. Historically, many roads entering the U.S. had no border inspection station. Before September 11, 2001, it was permissible for persons entering the U.S. to do so at any point (including back roads or closed border stations), as long as they proceeded directly to an open border inspection station. In fact, the U.S. Customs Service and U.S. Immigration and Naturalization Service routinely rented property in houses, post offices, and storefronts far from the physical border, and people entering the U.S. were expected to travel to these locations without stopping so they could make their declarations. This policy has since changed, and most of the roads entering the U.S. at locations other than an open and staffed border inspection station have since been barricaded.

Variations In some countries, immigration procedures are carried out by the armed forces rather than specific immigration officers. However, in most, the levying of duty on imports is still carried out by customs officers. Immigration clearance in some ports of entry have automated sections open to the country's own residents or citizens, such as the e-Channel found in Hong Kong and Macau, Global Entry found at some airports in the United States and other similar country-instituted programs. On some international borders, the concept of a port of entry does not exist or is at least not applied to select countries of free-crossing pacts. Travelers may cross the border wherever and whenever convenient. For example, and as such a pact, most EU citizens may travel freely within the Schengen Area, which is made up of 29 European countries. As with the example, in some cases, such free travel may be restricted to citizens of specific countries and to travelers who are not carrying goods over the customs limits; others may only cross the border at a designated border crossing during its opening times.

See also Border Border checkpoint Border control Customs Schengen Agreement

References

Illustrations

Worked examples

Example 1 — a first encounter with Port of entry

Start with the simplest possible case. Write down what Port of entry claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Port of entry before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Port of entry ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Port of entry

In research: Port of entry appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Port of entry in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Port of entry is common in secondary-school and first-year university syllabi. It links to neighbouring topics Borders, Freight transport, so understanding it makes those chapters shorter.
In everyday life: Look for Port of entry outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

How to study Port of entry in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Port of entry means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Port of entry out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Port of entry in simple terms?

In general, a port of entry (POE) is a place where one may lawfully enter a country. It typically has border security staff and facilities to check passports and visas and to inspect luggage to assure that contraband is not imported.

Why does Port of entry matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Port of entry?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Port of entry.