These Regulations amend the Building Regulations 2010 (“the Building Regulations”) and the Building (Approved Inspectors etc.) Regulations 2010 (“the Approved Inspectors Regulations”) as they apply in relation to Wales. The amendments made by these Regulations apply the new metric for the measurement of energy efficiency in the form of a target primary energy rate to new dwellings. Previously, primary energy consumption rates applied to buildings other than dwellings.