alfred chester beatty anglo-irish treaty belfast agreement british nationality law british nationality law and the republic of ireland chen case chester beatty library citizenship of the european union coat of arms common travel area constitution of ireland constitution of the irish free state derek hill european court of justice european economic area european union foreign births entry book gazette iceland ireland irish free state irish language irish passport jack charlton jean kennedy smith jus sanguinis jus soli liechtenstein liz mcmanus multiple citizenship naturalization netherlands nineteenth amendment of the constitution of ireland northern ireland norway oireachtas parliament of northern ireland republic of ireland republic of ireland national football team russborough house speaker of the united states house of representatives the irish times tiede herrema tory island twenty-seventh amendment of the constitution of ireland united kingdom united states wales