FIREARMS ACT (as amended) 1925-1990 

( a ) any person under the age of sixteen years, and

( b ) any person of intemperate habits, and

( c ) any person of unsound mind, and

(d) any person who has been sentenced to imprisonment for—

(i) an offence under the Firearms Acts 1925 to 2006, the Offences Against the State Acts 1939 to 1998 or the Criminal Justice (Terrorist Offences) Act 2005, or
(ii) an offence under the law of another state involving the production or use of a firearm,
and the sentence has not expired or it expired within the previous 5 years,

(e) any person who is bound by a recognisance to keep the peace or be of good behaviour, a condition of which is that the person shall not possess, use or carry any firearm or ammunition, and

(f) any person not ordinarily resident in the State (except a person who is temporarily so resident) for a period of 6 months before applying for a firearm certificate.