The Salt Range crosses the Indus in the Mianwali tahsil of the Punjab, and forms the boundary between Bannu and Dera Ismail Khan, merging eventually in the Waziri hills.
Broadly speaking, the subdivision is characteristic of Bengal, where revenue duties are in the background, and the tahsil of Madras, where the land settlement requires attention year by year.
The system of partitioning, and also the nomenclature, vary in the different provinces; but generally it may be said that the subdivision or tahsil is the ultimate unit of administration.
There is no administrative unit below the subdivision or tahsil.
They include the whole of the Zhob and Chagai political agencies, the eastern portion of the Quetta tahsil and other tracts, among which may be mentioned the Bolan Pass, comprising 36,401 sq.