Tariffs for the scheme are published by 15 July each year but they take effect retrospectively from the preceding 1 April. The scheme is operated by National Grid Electricity System Operator (ESO), the national transmission system operator, a subsidiary of National Grid plc. The tariff in 2022/23 is 0.040670p per kwh. Part 4 Section 198 - Short title, commencement and extent The following orders have been made under this section: The Energy Act 2004 (Commencement No. 1) Order 2004 (S.I. 2004/1973 (C. 87)) The Energy Act 2004 (Commencement No. 2) Order 2004 (S.I. 2004/2184 (C. 95)) The Energy Act 2004 (Commencement No. 3) Order 2004 (S.I. 2004/2575 (C. 110)) The Energy Act 2004 (Commencement No. 4) Order 2005 (S.I. 2005/442 (C. 20)) The Energy Act 2004 (Commencement No. 5) Order 2005 (S.I. 2005/877 (C. 38)) The Energy Act 2004 (Commencement No. 6) Order 2005 (S.I. 2005/2965 (C. 127)) The Energy Act 2004 (Commencement No. 7) Order 2006 (S.I. 2006/1964 (C. 66)) The Energy Act 2004 (Commencement No. 8) Order 2007 (S.I. 2007/1091 (C. 47) The Energy Act 2004 (Commencement No. 9) Order 2009 (S.I. 2009/1269 (C. 67)) The Energy Act 2004 (Commencement No. 10) Order 2010 (S.I. 2010/1889 (C. 98)) Schedule 14 Paragraph 11(b) repealed by Part 2 of Schedule 17 to the Serious Organised Crime and Police Act 2005. Schedule 15 This Schedule was repealed as to England and Wales by Schedule 28 to the Environmental Permitting (England and Wales) Regulations 2010. Paragraphs 1 to 8 and 10 to 12 were repealed as to Scotland by paragraph 1 of Schedule 7 to the Environmental Authorisations (Scotland) Regulations 2018. Schedule 16 Paragraph 9(b) was inserted by section 62(19)(b) of the Scotland Act 2016. References Sources "Energy Act 2004". Halsbury's Statutes of England and Wales. Fourth Edition. 2007 Reissue. Volume 33(2). Page 618. "Energy Act 2004". Current Law Statutes 2004. Sweet & Maxwell. London. W Green. Edinburgh. 2005. Volume 1. Chapter 20. External links The Energy Act 2004, as amended from the National Archives. The Energy Act 2004, as originally enacted from the National Archives. Explanatory notes to the Energy Act 2004. United Kingdom Acts of Parliament 2004 Energy law