Subdivisional headquarters were at Lawngtlai and Kamalanagar (Chawngte). Chhimtuipui District was divided into four rural development blocks, namely Lawngtlai, Sangau, Tuipang and Chawngte.[1] In November 1998 Lawngtlai District was created out of Chhimtuipui District, consisting of the Lawngtlai RD Block and the Chawngte RD Block.[1] The remaining area of Sangau RD Block and Tuipang RD Block was still called Chhimtuipui District, but the reduced district's name was soon changed to Siaha district.
