XIV. Restrictions and limitations States should support, by all possible means, the investigation of serious human rights violations and the prosecution of alleged perpetrators. Legitimate restrictions and limitations on investigations and prosecutions should be restricted to the minimum necessary to achieve their aim. XV. Non-judicial mechanisms States should also consider establishing non-judicial mechanisms, such as parliamentary or other public inquiries, ombudspersons, independent commissions and mediation, as useful complementary procedures to the domestic judicial remedies guaranteed under the Convention. XVI. Reparation States should take all appropriate measures to establish accessible and effective mechanisms which ensure that victims of serious human rights violations receive prompt and adequate reparation for the harm suffered. This may include measures of rehabilitation, compensation, satisfaction, restitution and guarantees of non‑repetition. Effective investigation of ill-treatment – Guidelines ► Page 128