Irish law permits the transit through Irish territory of a person being detained by the authorities of another state in two circumstances.
Section 40(1) of the Extradition Act 1965 allows the Minister for Justice, Equality and Law Reform to permit the transit through the State of a person being conveyed from one country to another upon that person's surrender pursuant to an agreement in the nature of an extradition agreement. This is subject to any relevant extradition provisions and to such conditions, if any, that the Minister thinks proper.
The Minister for Justice, Equality and Law Reform may also consent to the transfer of a sentenced prisoner through Irish territory pursuant to the Council of Europe Convention on the Transfer of Sentenced Persons 1983, when he is satisfied that Article 16 of that convention is applicable. The convention defines a sentence as a punishment involving deprivation of liberty ordered by a court on account of a criminal offence. As stated above, any authorisations in this area would be a matter for my colleague, the Minister for Justice, Equality and Law Reform.