According to Section 12(c) of the National Accountability Ordinance, 1999, when the property to be frozen is immovable land that pays revenue, the freezing must be executed through the ________________ of the district where the land is located.

Explanation

Under Section 12(c) of the National Accountability Ordinance, 1999, if the property to be frozen is immovable land subject to revenue, the freezing order should be implemented via the Collector of the district where the land lies. Other officials like the District Judge or Deputy Police Officer are not authorized for this purpose.