Tambon Sa Phra, Thap Rang, Phang Thiam, Nong Hoi and Map Krat were separated from Non Thai district to create the Phra Thong Kham minor district on July 15, 1996 [REF].
Following a decision of the Thai government on May 15, 2007, all of the 81 minor districts were upgraded to full districts [REF].