| 22/1983 : Obscene Publications (Amendment) |
| 31/2014 : Ocean University Of Sri Lanka |
| 24/1982 : Offences Against Aircraft |
| 12/1982 : Offences Against Public Property |
| 76/1988 : Offences Against Public Property (Amendment) |
| 28/1999 : Offences Against Public Property (Amendment) |
| 41/1979 : Offences Committed Under the Influence of Liquor (Special Provisions) |
| 18/1966 : Offensive Weapons |
| 02/2011 : Offensive Weapons (Amendment) |
| 34/2018 : Office for Reparations |
| 01/2024 : Office of National Unity and Reconciliation |
| 09/2017 : Office on Missing Persons (Establishment, Administration and Discharge of Functions) (Amendment) |
| 14/2016 : Office on Missing Persons (Establishment, Administration, and Discharge of Functions) |
| 33/1956 : Official Language |
| 18/1991 : Official Languages Commission |
| 37/2011 : Olangala Maha Sudarshana Paropakari Foundation |
| 14/1998 : Old Anandians 75-80 Group (Incorporation) |
| 09/2024 : Online Safety |
| 16/2012 : Organization for the Eraction of Balana Buddha Statue (Incorporation) |
| 45/1991 : Organizing Committee Of The Bentota Sri Anubuddha Maha Kasyapa Dalada Perahera (Incorporation) |
| 23/2008 : Our Kids Organization (Incorporation) |
| 51/2009 : Overseas Muslim Educational Trust of Sri Lanka (Incorporation) |
| 61/1957 : Overseas Telecommunication |
