United Nations Security Council Resolution 221
United Nations Security Council Resolution 221 was adopted by the United Nations Security Council on April 9, 1966. The Council, concerned that Southern Rhodesia might receive a large supply of oil from tanker MV Joanna V, which was docked in Beira, ordered Portugal to prevent the movement of oil along the Companhia do Pipeline Moçambique Rodésias pipeline.
Source: Wikipedia — United Nations Security Council Resolution 221 (CC BY-SA 4.0)