 Along with a number of other sub-unions, the Goldfields ceded from the ARFU to form the South Auckland Rugby Football Union in 1909.Several sub-unions split away from the South Auckland Union between 1909 and 1921 to form new independent unions, and in 1921 the Hauraki Plains, Paeroa, Piako, Waihi sub-unions did the same to form the Thames Valley Rugby Football Union (TVRFU).The union was from then on directly affiliated to the NZRU.