Māori can seek redress for the injustices of colonisation in one of two ways.
Since 1975, Māori have sought redress through the Waitangi Tribunal, a permanent Commission of Inquiry that is empowered to investigate alleged breaches of the Treaty of Waitangi (an agreement that protects Māori's right to self-determination). The Tribunal can make non-binding recommendations which form the basis of negotiations and a potential settlement between tribes (iwi) and the New Zealand Government. Settlements typically include an apology, financial compensation and the return of some land.
Recently, some Māori have successfully achieved similar outcomes through novel legal claims, e.g. on the basis that the Government had a duty to protect Māori which they had not fulfilled. These claims have been successfully argued in overseas jurisdictions without similar tribunals.