The Diocese of Pretoria, being the area falling north of the southern boundaries of the following magisterial districts: Barberton, Waterval-Boven, Belfast, Middelburg and Witbank; thence an artificial line from Argent Station on the Johannesburg – Witbank railway, running midway between Pretoria and Johannesburg to the junction of the Pretoria, Johannesburg and Krugersdorp district boundaries; and thence the southern boundaries of the Brits, Rustenburg and Swartruggens magisterial districts and the western boundary formed by the Swartruggens and Rustenburg districts.