# The Building Regulations &c. (Amendment) Regulations 2012, Regulation 23: Interpretation of Part 6


In regulation 35(1)—
(a) after the definition of “building” insert—
““building envelope” in relation to a building means the walls, floor, roof, windows, doors, roof windows and roof-lights;
“Crown authority” means the Crown Estate Commissioners, a Minister of the Crown, a government department, any other person or body whose functions are performed on behalf of the Crown (not being a person whose functions are performed on behalf of Her Majesty in her private capacity), or a person acting in right of the Duchy of Lancaster or the Duchy of Cornwall;
“Crown interest” means an interest belonging to Her Majesty in right of the Crown, or belonging to a Government Department, or held in trust for Her Majesty for the purposes of a government department;
“Crown building” means a building in which there is a Crown interest or a Duchy interest;
“Duchy interest” means an interest belonging to her Majesty in right of the Duchy of Lancaster, or belonging to the Duchy of Cornwall;”;
(b) after the definition of “energy assessor”—
(i) omit “and”; and
(ii) insert—
““major renovation” means the renovation of a building where more than 25% of the surface area of the building envelope undergoes renovation; and
“nearly zero-energy building” means a building that has a very high energy performance, as determined in accordance with a methodology approved under regulation 24, where the nearly zero or very low amount of energy required should be covered to a very significant extent by energy from renewable sources, including energy from renewable sources produced on-site or nearby.”; and
(c) omit the definition of “recommendation report”.

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Source: https://www.legislation.gov.uk/uksi/2012/3119/regulation/23 (the official version)
Page: https://openlegislation.uk/building-regulations-c-amendment-regulations-2012/regulation-23
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.