Mr. Micheál O'Mahony:

If Ireland is the point of entry to the European Union, this must be at a border inspection port, but it could conceivably enter the Union at Rotterdam, for example, which is highly likely. It can then come into Ireland through Rosslare, Cork Airport or any Irish entry port. It does not have to be through a border inspection port. As the border inspection port is known as the BIP, it is "bipped", so to speak, in Rotterdam and it is then subject to free trade within the European Union. That is the basic principle of the Common Market.