Yesterday the rename of an administrative village in Chiang Rai was announced in the Royal Gazette. Mu 10 of Si Kham subdistrict, Mae Chan district changes its name from Ban Mae Kham Phatthana (บ้านแม่คำพัฒนา) to Ban Si Kham (บ้านศรีค้ำ). This change was approced by the board to consider name changes in their 3rd meeting this year on September 24, and the announcement was signed by the province governor of Chiang Rai on October 15. As it does not mention any specific date on which it became effective, I guess it became effective same day as it was signed.
As I cannot find any Gazette announcement on the creation of this Muban, it was probably created before 2002 - but after 1984 as it wasn't part of the subdistrict when that was created [Gazette]. By the name of the Muban I believe it was split off from Mu 3 (Ban Mae Kham Lak Chet), and since it is now renamed to the same name as the subdistrict I guess it is located in the most populated part of the subdistrict along Phahayothin highway.