These Regulations amend the Energy Performance of Buildings (England and Wales) Regulations 2012 (S.I. 2012/3118, as amended by S.I. 2013/10, S.I. 2013/181, S.I. 2013/603, S.I. 2014/880 and S.I. 2015/609) (“the principal Regulations”) to supplement the implementation by those Regulations of Article 27 (penalties) of Directive 2010/31/EU of the European Parliament and of the Council on the energy performance of buildings (recast) (OJ No L 153, 18.6.2010, p. 13).