Nghị định 77/1999/NĐ-CP

To dissolve To Hieu agricultural farm township of Mai Son district. The management of farm township residents, who are living in Hat Lot, Chieng Mung, Muong Bon, Co Noi communes and Hat Lot district township, now transferred to that communes and district township.

To dissolve Chieng Sung agricultural farm township of Mai Son district. To establish Chieng Sung commune on the basis of the whole land area of 4,622 ha and a population of 4,500 of Chieng Sung agricultural farm township.

To dissolve Chieng Ve agricultural farm township of Moc Chau district. To annex the population of 7,292 of Chieng Ve agricultural farm township to Long Sap commune, Moc Chau district. To establish Chieng Son commune on the basis of a land area of 9,788 ha and a population of 7,932 of Long Sap commune.

To establish Bac Yen district township, capital of Bac Yen district, on the basis of a land area of 4,240 ha and a population of 4,240 of Phieng Ban district.- (Summary)