| The National Insurance and Industrial Injuries (Reciprocal Agreement with Luxembourg) Order (Northern Ireland) 1955 | 1955 No. 77 | Order | modified | The Social Security (Reciprocal Agreements) Order (Northern Ireland) 2005 | 2005 No. 544 | Sch. 1 2 | Not yet | |
| The National Insurance and Industrial Injuries (Reciprocal Agreement with the Netherlands) Order (Northern Ireland) 1955 | 1955 No. 122 | Order | modified | The Social Security (Reciprocal Agreements) Order (Northern Ireland) 2005 | 2005 No. 544 | Sch. 1 2 | Not yet | |
| The National Insurance and Industrial Injuries (Reciprocal Agreement with Israel) Order (Northern Ireland) 1958 | 1958 No. 32 | Order | modified | The Social Security (Reciprocal Agreements) Order (Northern Ireland) 2005 | 2005 No. 544 | Sch. 1 2 | Not yet | |
| The Family Allowances, National Insurance and Industrial Injuries (Reciprocal Agreement with Belgium) Order (Northern Ireland) 1958 | 1958 No. 93 | Order | modified | The Social Security (Reciprocal Agreements) Order (Northern Ireland) 2005 | 2005 No. 544 | Sch. 1 2 | Not yet | |
| The National Insurance and Industrial Injuries (Reciprocal Agreeent with France) Order (Northern Ireland) 1958 | 1958 No. 101 | Order | modified | The Social Security (Reciprocal Agreements) Order (Northern Ireland) 2005 | 2005 No. 544 | Sch. 1 2 | Not yet | |
| The National Insurance and Industrial Injuries (Reciprocal Agreement with Italy) Order (Northern Ireland) 1958 | 1958 No. 130 | Order | modified | The Social Security (Reciprocal Agreements) Order (Northern Ireland) 2005 | 2005 No. 544 | Sch. 1 2 | Not yet | |
| The Family Allowances, National Insurance and Industrial Injuries (Reciprocal Agreement with Yugoslavia) Order (Northern Ireland) 1958 | 1958 No. 151 | Order | modified | The Social Security (Reciprocal Agreements) Order (Northern Ireland) 2005 | 2005 No. 544 | Sch. 1 2 | Not yet | |
| The Family Allowance National Insurance and Industrial Injuries (Reciprocal Agreement with Denmark) (Northern Ireland) 1960 | 1960 No. 16 | Order | modified | The Social Security (Reciprocal Agreements) Order (Northern Ireland) 2005 | 2005 No. 544 | Sch. 1 2 | Not yet | |
| The Family Allowances, National Insurance and Industrial Injuries (Reciprocal Agreement with Germany) Order (Northern Ireland) 1961 | 1961 No. 148 | Order | modified | The Social Security (Reciprocal Agreements) Order (Northern Ireland) 2005 | 2005 No. 544 | Sch. 1 2 | Not yet | |
| The National Insurance and Industrial Injuries (Reciprocal Agreement with Turkey) Order (Northern Ireland) 1961 | 1961 No. 149 | Order | modified | The Social Security (Reciprocal Agreements) Order (Northern Ireland) 2005 | 2005 No. 544 | Sch. 1 2 | Not yet | |
| The National Insurance and Industrial Injuries (Reciprocal Agreement with the Republic of Ireland) Order (Northern Ireland) 1964 | 1964 No. 142 | Order | modified | The Social Security (Reciprocal Agreements) Order (Northern Ireland) 2005 | 2005 No. 544 | Sch. 1 2 | Not yet | |
| The National Insurance (Republic of Ireland) Order (Northern Ireland) 1966 | 1966 No. 50 | Order | modified | The Social Security (Reciprocal Agreements) Order (Northern Ireland) 2005 | 2005 No. 544 | Sch. 1 2 | Not yet | |
| The Family Allowances, National Insurance and Industrial Injuries (Switzerland) Order (Northern Ireland) 1969 | 1969 No. 143 | Order | modified | The Social Security (Reciprocal Agreements) Order (Northern Ireland) 2005 | 2005 No. 544 | Sch. 1 2 | Not yet | |
| The National Insurance and Industrial Injuries (Bermuda) Order (Northern Ireland) 1970 | 1970 No. 22 | Order | modified | The Social Security (Reciprocal Agreements) Order (Northern Ireland) 2005 | 2005 No. 544 | Sch. 1 2 | Not yet | |
| The National Insurance (Republic of Ireland) Order (Northern Ireland) 1972 | 1972 No. 4 | Order | modified | The Social Security (Reciprocal Agreements) Order (Northern Ireland) 2005 | 2005 No. 544 | Sch. 1 2 | Not yet | |
| The Family Allowances, National Insurance and Industrial Injuries (Spain) Order (Northern Ireland) 1975 | 1975 No. 77 | Order | modified | The Social Security (Reciprocal Agreements) Order (Northern Ireland) 2005 | 2005 No. 544 | Sch. 1 2 | Not yet | |
| The Social Security (Portugal) Order (Northern Ireland) 1979 | 1979 No. 303 | Order | modified | The Social Security (Reciprocal Agreements) Order (Northern Ireland) 2005 | 2005 No. 544 | Sch. 1 2 | Not yet | |
| The Social Security (Austria) Order (Northern Ireland) 1981 | 1981 No. 144 | Order | modified | The Social Security (Reciprocal Agreements) Order (Northern Ireland) 2005 | 2005 No. 544 | Sch. 1 2 | Not yet | |
| The Social Security (Mauritius) Order (Northern Ireland) 1981 | 1981 No. 363 | Order | modified | The Social Security (Reciprocal Agreements) Order (Northern Ireland) 2005 | 2005 No. 544 | Sch. 1 2 | Not yet | |
| The Social Security (Cyprus) Order (Northern Ireland) 1983 | 1983 No. 387 | Order | modified | The Social Security (Reciprocal Agreements) Order (Northern Ireland) 2005 | 2005 No. 544 | Sch. 1 2 | Not yet | |
| The Social Security (New Zealand) Order (Northern Ireland) 1983 | 1983 No. 432 | Order | modified | The Social Security (Reciprocal Agreements) Order (Northern Ireland) 2005 | 2005 No. 544 | Sch. 1 2 | Not yet | |
| The Social Security (Finland) Order (Northern Ireland) 1984 | 1984 No. 68 | Order | modified | The Social Security (Reciprocal Agreements) Order (Northern Ireland) 2005 | 2005 No. 544 | Sch. 1 2 | Not yet | |
| The Social Security (United States of America) Order (Northern Ireland) 1984 | 1984 No. 449 | Order | modified | The Social Security (Reciprocal Agreements) Order (Northern Ireland) 2005 | 2005 No. 544 | Sch. 1 2 | Not yet | |
| The Social Security (Iceland) Order (Northern Ireland) 1985 | 1985 No. 205 | Order | modified | The Social Security (Reciprocal Agreements) Order (Northern Ireland) 2005 | 2005 No. 544 | Sch. 1 2 | Not yet | |
| The Social Security (Sweden) Order (Northern Ireland) 1988 | 1988 No. 119 | Order | modified | The Social Security (Reciprocal Agreements) Order (Northern Ireland) 2005 | 2005 No. 544 | Sch. 1 2 | Not yet | |
| The Social Security (Philippines) Order (Northern Ireland) 1989 | 1989 No. 428 | Order | modified | The Social Security (Reciprocal Agreements) Order (Northern Ireland) 2005 | 2005 No. 544 | Sch. 1 2 | Not yet | |
| The Social Security (Norway) Order (Northern Ireland) 1991 | 1991 No. 139 | Order | modified | The Social Security (Reciprocal Agreements) Order (Northern Ireland) 2005 | 2005 No. 544 | Sch. 1 2 | Not yet | |
| Social Security Contributions and Benefits (Northern Ireland) Act 1992 | 1992 c. 7 | Act | modified | The Social Security (Reciprocal Agreements) Order (Northern Ireland) 2005 | 2005 No. 544 | art. 2 Sch. | Yes | |
| Social Security Administration (Northern Ireland) Act 1992 | 1992 c. 8 | Act | modified | The Social Security (Reciprocal Agreements) Order (Northern Ireland) 2005 | 2005 No. 544 | art. 2 Sch. 1 2 | Yes | |
| The Social Security (Barbados) Order (Northern Ireland) 1992 | 1992 No. 151 | Order | modified | The Social Security (Reciprocal Agreements) Order (Northern Ireland) 2005 | 2005 No. 544 | Sch. 1 2 | Not yet | |
| The Social Security (Jersey and Guernsey) Order (Northern Ireland) 1994 | 1994 No. 427 | Order | modified | The Social Security (Reciprocal Agreements) Order (Northern Ireland) 2005 | 2005 No. 544 | Sch. 1 2 | Not yet | |
| The Social Security (Canada) Order (Northern Ireland) 1995 | 1995 No. 405 | Order | modified | The Social Security (Reciprocal Agreements) Order (Northern Ireland) 2005 | 2005 No. 544 | Sch. 1 2 | Not yet | |
| The Social Security (Malta) Order (Northern Ireland) 1996 | 1996 No. 345 | Order | modified | The Social Security (Reciprocal Agreements) Order (Northern Ireland) 2005 | 2005 No. 544 | Sch. 1 2 | Not yet | |
| The Social Security (Jamaica) Order (Northern Ireland) 1997 | 1997 No. 183 | Order | modified | The Social Security (Reciprocal Agreements) Order (Northern Ireland) 2005 | 2005 No. 544 | Sch. 1 2 | Not yet | |
| The Social Security (Reciprocal Agreements) Order (Northern Ireland) 2005 | 2005 No. 544 | art. 1 | coming into force | The Social Security (Reciprocal Agreements) Order (Northern Ireland) 2005 | 2005 No. 544 | art. 1 | Yes | |
| The Social Security (Reciprocal Agreements) Order (Northern Ireland) 2005 | 2005 No. 544 | art. 2 | coming into force | The Social Security (Reciprocal Agreements) Order (Northern Ireland) 2005 | 2005 No. 544 | art. 1 | Yes | |
| The Social Security (Reciprocal Agreements) Order (Northern Ireland) 2005 | 2005 No. 544 | Sch. 1 | coming into force | The Social Security (Reciprocal Agreements) Order (Northern Ireland) 2005 | 2005 No. 544 | art. 1 | Yes | |
| The Social Security (Reciprocal Agreements) Order (Northern Ireland) 2005 | 2005 No. 544 | Sch. 2 | coming into force | The Social Security (Reciprocal Agreements) Order (Northern Ireland) 2005 | 2005 No. 544 | art. 1 | Yes | |