Open Tenders can be viewed accessed via SA Tenders & Contract website. https://www.tenders.sa.gov.au/welcome
The site provides easy-to-use access to all publicly available bidding opportunities within the South Australian Government. Electronic submissions can be made using the Electronic Lodgement Service. You can also view the details of all South Australian Government-awarded contracts for goods, services and works.
Open Tenders are generally advertised in the Tuesday edition of The Adelaide Advertiser. Tenders are required to be lodged by the due date and closing time, as per the tender instructions.