The law is such that if an immovable aboriginal artifact is found on your property you're shit out of luck. You become responsible to keep it intact, you have to allow access to various people and likely be limited in your land use, all with no compensation.

This creates an incentive to destroy such artifacts (i.e. scarred trees, petroglyphs etc) and not tell anyone.

It also exists in a wider context of "history wars", where federal institutions take sides on quite controversial subjects, further alienating the stereotypical farmers.