| 36/1998 : T. B Ilangaratne Sahurda Sansadaya (Incorporation) |
| 14/2012 : T. B. Ekanayake Foundation ( Incorporation) |
| 26/2006 : T. B. Tennakoon Foundation (Incorporation) |
| 49/1988 : Talapitiya Ahadiyya Association (Incorporation) |
| 28/1958 : Tamil Language (Special Provisions) |
| 05/1978 : Tax Amnesty |
| 05/1989 : Tax Amnesty |
| 30/1992 : Tax Amnesty (Housing and Commercial Buildings) |
| 04/1997 : Tax and Foreign Exchange Amnesty |
| 47/1998 : Tax and Foreign Exchange Amnesty |
| 23/2011 : Tax Appeals Commission |
| 04/2012 : Tax Appeals Commission (Amendment) |
| 20/2013 : Tax Appeals Commission (Amendment) |
| 22/1957 : Tax Reserve Certificates |
| 12/1981 : Tax Reserve Certificates (Amendment) |
| 51/1985 : Tea (Tax and Control of Export) (Amendment) |
| 16/1959 : Tea (Tax and Control of Export) Act |
| 02/1958 : Tea and Rubber Estates (Control of Fragmentation) |
| 20/2005 : Tea and Rubber Estates (Control of Fragmentation) (Amendment) |
| 04/1970 : Tea and Rubber Subsidy (Amendment) |
| 51/1957 : Tea Control |
| 39/1974 : Tea Control (Amendment) |
| 03/1983 : Tea Control (Amendment) |
| 03/1993 : Tea Control (Amendment) |
| 26/1969 : Tea Propaganda (Amendment) |
| 33/1974 : Tea Research (Amendment) |
| 52/1993 : Tea Research Board |
| 30/2003 : Tea Research Board (Amendment) |
| 43/2006 : Tea Research Board (Amendment) |
| 08/2019 : Tea Research Board (Amendment) |
| 47/2000 : Tea Shakthi Fund |
| 35/1975 : Tea Small Holdings Development |
| 36/1991 : Tea Small Holdings Development (Amendment) |
| 21/1997 : Tea Small Holdings Development (Amendment) |
| 34/2003 : Tea Small Holdings Development (Amendment) |
| 42/2006 : Tea Small Holdings Development (Amendment) |
| 12/1958 : Tea Subsidy |
| 21/2011 : Telecommunication Levy |
| 08/2013 : Telecommunication Levy (Amendment) |
| 11/2014 : Telecommunication Levy (Amendment) |
| 10/1970 : Telecommunications (Amendment) |
| 17/1974 : Telecommunications (Amendment) |
| 67/1979 : Telecommunications (Amendment) |
| 25/1996 : Telecommunications (Special Provisions) |
| 15/1971 : Temporary Residence Tax |
| 45/1971 : Termination of Employment of Workmen (Special Provisions) |
| 04/1976 : Termination of Employment of Workmen (Special Provisions) (Amendment) |
| 51/1988 : Termination of Employment of Workmen (Special Provisions) (Amendment) |
| 12/2003 : Termination of Employment of Workmen (Special Provisions) (Amendment) |
| 20/2008 : Termination of Employment of Workmen (Special Provisions) (Amendment) |
| 29/2021 : Termination of Employment of Workmen (Special Provisions) (Amendment) |
| 23/2022 : Termination of Employment of Workmen (Special Provisions)(Amendment) |
| 20/1990 : Tertiary and Vocational Education |
| 50/1999 : Tertiary and Vocational Education (Amendment) |
| 33/1996 : Textile Quota Board |
| 04/1984 : Textile Training and Services Centre |
| 43/2007 : Thai Sri Lanka Buddhist Cultural Centre (Incorporation) |
| 63/2009 : Thaliyawaka Ananda Bodhi Cultural Foundation (Incorporation) |
| 47/1982 : Thanthai Chelva Memorial Trust (Incorporation) |
| 07/2011 : Tharunyata Hetak Organization (Incorporation) |
| 46/1991 : The Board Of Management Of The Muslim Ladies Arabic College Managing Society, Kal-Eliya (Incorporation) |
| 31/2000 : The Board of Trustees of the Ronnie de Mel Ruhunu University Trust (Incorporation) |
| 56/1993 : The Catholic Union Of Sri Lanka (Incorporation) |
| 10/1971 : The Ceylon Association for the Mentally Retarded (Incorporation) Act |
| 17/1994 : The Church Of The Gospel Ministries In Sri Lanka (Incorporation) |
| 01/1992 : The Diabetic Association of Sri Lanka (Incorporation) |
| 50/2009 : The Future world Organization (Incorporation) |
| 69/1992 : The International Society For Krishna Consciousness (ISKON)-Sri Lanka Branch (Incorporation) |
| 37/1993 : The Medico-Legal Society of Sri Lanka (Incorporation) |
| 05/2024 : The Recognition and Enforcement of International Settlement Agreements Resulting from Mediation |
| 17/2014 : The Rehabilitation of Buddhist Temples Foundation (Incorporation) |
| 48/1991 : The Servants Of The Buddha (Incorporation) |
| 26/1998 : The Sri Lanka Historical Association (Incorporation) |
| 12/2009 : The Sri Lanka Institute of Textile and Apparel |
| 51/1991 : The World Buddhist Peace Foundation (Incorporation) |
| 01/2009 : The World Fellowship of Buddhist Sri Lanka Centre (Incorporation) |
| 09/1988 : Thoroughfares (Amendment) |
| 81/1988 : Thoroughfares (Amendment) |
| 23/2000 : Thurusaviya Fund |
| 08/1999 : Tobacco Tax |
| 40/1973 : Tobacco Tax (Amendment) |
| 05/1979 : Tobacco Tax (Amendment) |
| 09/2004 : Tobacco Tax(Amendment) |
| 38/2005 : Tourism |
| 14/1968 : Tourist Development |
| 02/1987 : Tourist Development (Amendment) |
| 39/1991 : Tourist Development (Amendment) |
| 01/1978 : Tower Hall Theatre Foundation |
| 11/1997 : Tower Hall Theatre Foundation (Amendment) |
| 49/2000 : Town and Country Planning (Amendment) |
| 30/1964 : Trade Marks |
| 25/1970 : Trade Union Representative (Entry into Estates) |
| 24/1970 : Trade Unions (Amendment) |
| 05/1995 : Transfer of Offenders |
| 25/1974 : Transfer of Powers (Anuradhapura Preservation Board) |
| 47/1979 : Transfer of Powers (Anuradhapura Preservation Board) (Amendment) |
| 58/1992 : Transfer of Powers (Divisional Secretaries) |
| 48/1987 : Transplantation of Human Tissues |
| 06/1981 : Transport Board (Amendment) |
| 09/1989 : Treasury Certificates of Deposit |
| 13/1990 : Trust Receipts (Amendment) |
| 19/2024 : Trust Receipts (Amendment) |
| 07/1968 : Trusts (Amendment) |
| 06/ 2018 : Trusts (Amendment) |
| 16/2005 : Tsunami (Special Provisions) |
| 69/1981 : Turnover Tax |
| 39/1983 : Turnover Tax (Amendment) |
| 47/1984 : Turnover Tax (Amendment) |
| 54/1985 : Turnover Tax (Amendment) |
| 09/1987 : Turnover Tax (Amendment) |
| 06/1988 : Turnover Tax (Amendment) |
| 06/1989 : Turnover Tax (Amendment) |
| 43/1990 : Turnover Tax (Amendment) |
| 13/1991 : Turnover Tax (Amendment) |
| 31/1992 : Turnover Tax (Amendment) |
| 27/1993 : Turnover Tax (Amendment) |
| 08/1997 : Turnover Tax (Amendment) |
| 46/1998 : Turnover Tax (Amendment) |
