Thanks for the Wikipedia source. Here is the law: http://www.irishstatutebook.ie/eli/1997/si/277/made/en/print http://www.irishstatutebook.ie/eli/1997/si/277/

Thanks for the Wikipedia source. Here is the law: http://www.irishstatutebook.ie/eli/1997/si/277/made/en/print http://www.irishstatutebook.ie/eli/1997/si/277/made/en/print Checks by air and sea are authorized and implemented. The UK Border Force also performs spot inspections.