Anyone can nominate a place or object in South Australia to be considered for State heritage listing. In order to determine if a place or object has State heritage significance, it will be assessed against certain criteria by the South Australian Heritage Council.
The South Australian Heritage Council, supported by DEW, is responsible for the assessment and listing of State heritage places, while local government manages local heritage registers. Local and State heritage places are recorded in the South Australian Heritage Register.
The Commonwealth Department of the Environment has produced a guide outlining the different thresholds for heritage listing in Australia. You can read it here.