These Regulations implement legislative changes that arise from the commencement of provisions of the Civil Aviation Act 2012 (“the 2012 Act”) that are concerned with the regulation of operators of dominant airports. Those provisions are commenced by the Civil Aviation Act 2012 (Commencement No. 1, Transitional, Transitory and Savings Provisions) Order 2013 (S.I. 2013/589(C. 23)) (“the 2013 Order”). In particular, section 76(1) of the 2012 Act repeals Part IV of the Airports Act 1986 and section 76(2) revokes Part IV of the Airports (Northern Ireland) Order 1994.