3 19. States should consider incorporating into the national law norms proscribing abuses of power and providing remedies to victims of such abuses. In particular, such remedies should include restitution and/or compensation, and necessary material, medical, psychological and social assistance and support. 20. States should consider negotiating multilateral international treaties relating to victims, as defined in paragraph 18. 21. States should periodically review existing legislation and practices to ensure their responsiveness to changing circumstances, should enact and enforce, if necessary, legislation proscribing acts that constitute serious abuses of political or economic power, as well as promoting policies and mechanisms for the prevention of such acts, and should develop and make readily available appropriate rights and remedies for victims of such acts.