 They were issued on behalf of the "Supreme Command of the Revolution" (the regime's leadership).AI-5, the most infamous of all Institutional Acts, was issued by dictator Artur da Costa e Silva, president at the time on December 13, 1968.It resulted in the forfeiture of mandates, interventions ordered by the President in municipalities and states and also in the suspension of any constitutional guarantees which eventually resulted in the institutionalization of the torture commonly used as a tool by the State.