This system was reverted to the thana system in 1992. Later in 1999 geographic regions under administrations of thanas were converted into upazilas. All administrative terms in this level were renamed from thana to upazila.
This system reverted to the previous thana system in 1992. Later, areas under thana administration were reorganized into upazilas in 1999, and all administrative terms at this level were renamed from thana to upazila.