3.—(1) During the interim period, Part IV of the 1986 Act has effect with the following modifications—
(a)references to an airport subject to economic regulation under that Part are to be treated as references to an airport that is designated under that Part,
(b)references to the granting, or revoking, of a permission under that Part in respect of an airport are to be treated as references to the making of an order designating, or revoking the designation of, an airport,
(c)references to a permission being or continuing in force under that Part in respect of an airport are to be treated as references to the airport being designated under that Part, and
(d)the reference in section 51(8) to a copy of a permission in respect of an airport is to be treated as a reference to a copy of an order designating the airport.
(2) Nothing in this Article prevents action being taken under Part IV of the 1986 Act in respect of any failure before 6th April 2013 to comply with conditions imposed under that Part in relation to an airport.