Section 18(1)(a) in The Bharatiya Vayuyan Adhiniyam, 2024
(a)direct that no building or structure shall be constructed or erected, or no tree shall be planted on any land within such radius, not exceeding twenty kilometres from the aerodrome reference point, as may be specified in the notification and where there is any building, structure or tree on such land, also direct the owner or the person having control of such building, structure or tree to demolish such building or structure or, as the case may be, to cut such tree within such period as may be specified in the notification;