Regarding Pete's comment about creating a new Person for "foreigners", my girlfriend is from England. When she moved here she needed to apply for a PPS number (Irish Social Services Number) in order to begin employment. She applied and they eventually issued a brand new number for her. She didn't apply for citizenship or anything like that, just for an "Irish" person...
PPS actually stands for PERSONAL PUBLIC SERVICE number...
Printed copy · Anthology Volume 9, page 340Printed copy from The Tender For Law Anthology, Volume 9, page 340 (printed 13 June 2014). Added by this site; not part of the Facebook export.