The process of compulsory acquisition of land is covered in the Land Acquisition Act 1969 (SA).

Land is usually acquired for infrastructure projects such as constructing new roads, railways, schools and sporting facilities.

An Authority, such as the Commissioner of Highways or a local council, can acquire land whether the owner of that land agrees or not. 'Land' includes an 'interest' in land which includes 'an easement, right, power, or privilege in, under, over, affecting, or in connection with, the land' [s 6].

The power to acquire land is authorised by numerous Acts of Parliament. Examples of acquiring authorities and the relevant legislation include:

The Department for Infrastructure and Transport provides detailed information about land acquisition and the process on its website.