http://www.legislation.gov.uk/wsi/2000/3156/introduction/madeThe Smoke Control Areas (Authorised Fuels) (Amendment) (Wales) Regulations 2000SmokeKing's Printer of Acts of Parliament2011-07-05CLEAN AIR, WALES Section 20 of the Clean Air Act 1993 provides that where smoke is emitted from a chimney in a smoke control area and that chimney is either —a chimney of a building; ora chimney serving the furnace of a fixed boiler or industrial plant (not being a chimney of a building), The Smoke Control Areas (Authorised Fuels) (Amendment) (Wales) Regulations 2000Rheoliadau Ardaloedd Rheoli Mwg (Tanwyddau Awdurdodedig) (Diwygio) (Cymru) 2000RegulationsThe Smoke Control Areas (Authorised Fuels)(Wales) Regulations 2001Rheoliadau Ardaloedd Rheoli Mwg (Tanwyddau Awdurdodedig) (Cymru) 2001Sch. 2reg. 3(2)reg. 1(2) 2000 No. 3156 (W. 205 ) Made 28th November 2000 Coming into force 1st December 2000 The National Assembly for Wales makes the following Regulations in exercise of the powers conferred on it by sections 20(6) and 63(1) of the Clean Air Act 1993 and of all other powers enabling it in that behalf. 1993 c. 11.The functions of the Secretary of State under section 20(6) of the Clean Air Act 1993 were transferred to the National Assembly for Wales by the National Assembly for Wales (Transfer of Functions) Order 1999 (S.I. 1999/672).