According to the Aircraft Act in the interest of the safety of aircraft operations, if the Central Government decides to regulate the height of buildings, structures, and trees within a specified radius from the aerodrome reference point, what actions can it take according to the given provisions given under section 9A pf the Act?

Direct the reduction of the height of existing buildings, structures, or trees exceeding the specified height, Explanation: Section 9A. Power of Central Government to prohibit or regulate construction of buildings, planting of trees, etc.: (ii) direct that no building or structure higher than such height as may be specified in the notification shall be constructed or erected, or no tree, which is likely to grow or ordinarily grows higher than such height as may be specified in the notification, 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 the height of any building or structure or tree on such land is higher than the specified height, also direct the owner or the person having control of such building, structure or tree to reduce the height thereof so as not to exceed the specified height, within such period as may be specified in the notification.