If you are arriving from Puerto Rico in a country other than the United States, you must go through Customs.
If you are arriving in a US airport from Puerto Rico, for instance, if you are arriving in Miami, or New York, or Los Angeles, you are on a domestic flight and will not be asked to go through Customs.
If you started in Puerto Rico, you started from within the US. If you started from Another Country, you went through US Customs when you arrived in Puerto Rico.
Yes, but you must pass through Customs & you must now have a passport as well!
Nothing! If you were born in Puerto Rico you are a US Citizen.=no=n-o=NONO
Yes. You must pass through customs once you cross the bridge.
Both. US Customs, Immigration and Agriculture pre-clear passengers in Bermuda before boarding flights to the US, so they are treated like domestic passengers when arriving in the US. They must go through normal border controls before boarding the flight, however. Freight shipped on the same flight will, as far as I am aware, be treated as international freight, having not been pre-cleared in Bermuda. Passengers flying to Bermuda from the US must clear HM Customs and Bermuda Immigration on arrival.
The people of Puerto Rico (through an election called a plebiscite)Congress (though legislation admitting Puerto Rico as a State - House and Senate must pass the legislation)President of the United States (Must sign the legislation admitting the territory into the union of states)
they must have a griote
No because Canadian flights to Mexico go north over the north pole and over South America not south over the USA, {Just Kidding} no you do not have to go threw US customs on a flight from Canada to Mexico or vise versa.
In the United States: "Aircraft arriving at international airports don't need to request permission to land, known as landing rights, from CBP [US Customs and Border Protection]. However, an advance notice of the estimated time of arrival, in local time, must be transmitted to CBP for each flight. In general, a one-hour advance notice of arrival is sufficient, [...]" From the US Customs and Border Protection's Website
It means that it has cleared that Country's outgoing customs office. After that it will be dispatched to whatever country and then must go through the receiving Country's inbound customs office and then will get taken to the local post office and forwarded for delivery from there.
I imagine there must be.
Since it is a Caribbean Island it must have a coastline.
Yes you can send supplements to Philippines from the US. But most pharmaceutical products are licensed and must go through a licensed agent. This is what you need to check from customs.