(f) the lawful arrest or detention of a person to prevent his effecting an unauthorised entry in to the country or of a person against whom action is being taken with a view to deportation or extradition.
(f) duine a ghabháil nó a choinneáil go dleathach chun é a chosc ó theacht isteach gan údarás sa tír, nó duine a ghabháil nó a choinneáil amhlaidh a bhfuil beart á thionscnamh ina choinne d'fhonn é d'ionnarbadh nó d'eiseachadadh.