Letters Patent: A legal studies case study to keep watch

The ABC reported today that 

The Ngarrindjeri people have been asked by the South Australian Government for a clearer idea of what they see as the legal consequences for SA from what is known as the Letters Patent of 1836.

Founding Docs stated that 

The Letters Patent used the enabling provisions of the South Australia Act 1834 to establish the Province of South Australia and precisely define its boundaries. They also went beyond the strict provision of the Act by including a significant guarantee of the rights of 'any Aboriginal Natives' or their descendants to lands they 'now actually occupied or enjoyed'.

ANTAR SA provides a number of links to this issue.

What does it mean? The consequences of this. Let's keep watching.