sentences:  On 15 May 2007, all 81 minor districts were upgraded to full districts.With publication in the "Royal Gazette" on 24 August the upgrade became official.Neighboring districts are (from the north clockwise) Hankha of Chainat Province; Doem Bang Nang Buat and Dan Chang of Suphanburi Province; and Ban Rai of Uthai Thani Province.