| 194 | The Health and Personal Social Services (Northern Ireland) Order | 5 Feb 1991 |
| 196 | The Redundancy Fund (Abolition) (Northern Ireland) Order | 5 Feb 1991 |
| 197 | The Road Traffic (Amendment) (Northern Ireland) Order | 5 Feb 1991 |
| 759 | The Appropriation (Northern Ireland) Order | 20 Mar 1991 |
| 760 | The Census (Confidentiality) (Northern Ireland) Order | 20 Mar 1991 |
| 761 | The Financial Provisions (Northern Ireland) Order | 20 Mar 1991 |
| 762 | The Food Safety (Northern Ireland) Order | 20 Mar 1991 |
| 764 | The Repayment of Fees and Charges (Northern Ireland) Order | 20 Mar 1991 |
| 765 | The Statutory Sick Pay (Northern Ireland) Order | 20 Mar 1991 |
| 1219 | The Dangerous Vessels (Northern Ireland) Order | 21 May 1991 |
| 1220 | The Planning (Northern Ireland) Order | 21 May 1991 |
| 1462 | The Cinemas (Northern Ireland) Order | 26 Jun 1991 |
| 1466 | The Fisheries (Amendment) (Northern Ireland) Order | 26 Jun 1991 |
| 1707 | The Access to Personal Files and Medical Reports (Northern Ireland) Order | 24 Jul 1991 |
| 1708 | The Appropriation (No. 2) (Northern Ireland) Order | 24 Jul 1991 |
| 1711 | The Criminal Justice (Northern Ireland) Order | 24 Jul 1991 |
| 1712 | The Disability Living Allowance and Disability Working Allowance (Northern Ireland) Order | 24 Jul 1991 |
| 1713 | The Fair Employment (Amendment) (Northern Ireland) Order | 24 Jul 1991 |
| 1714 | The Genetically Modified Organisms (Northern Ireland) Order | 24 Jul 1991 |
| 1721 | The Statistics (Confidentiality) (Northern Ireland) Order | 24 Jul 1991 |
| 2292 | The Dangerous Dogs (Northern Ireland) Order | 16 Oct 1991 |
| 2294 | The Social Security (Contributions)(Northern Ireland) Order | 16 Oct 1991 |
| 2628 | The Child Support (Northern Ireland) Order | 19 Nov 1991 |
| 2631 | The Judicial Pensions (Northern Ireland) Order | 19 Nov 1991 |
| 2872 | The Children and Young Persons (Protection from Tobacco) (Northern Ireland) Order | 19 Dec 1991 |