Under Section 18 of the Bharatiya Vayuyan Adhiniyam, 2024, the Central Government may restrict the construction of buildings or planting of trees exceeding a specified height within what maximum radius from the aerodrome reference point?

Section 18(1) empowers the Central Government, where necessary for aircraft-operation safety, to notify restrictions on construction of buildings, structures, or tree planting exceeding a specified height on land within a radius not exceeding twenty kilometres from the aerodrome reference point. Clause (a) permits outright prohibition within the radius; clause (b) allows height-based regulation instead. In fixing the radius and permissible height, Section 18(2) requires consideration of the aircraft operated at that aerodrome and international standards/recommended practices. Non-compliant owners may be directed to demolish, cut, or reduce height, with due notice under Section 18(3), and every person is bound to comply under Section 18(4).